Vulnerability-Lookup

CVE-2018-6789 (GCVE-0-2018-6789)

Vulnerability from cvelistv5 – Published: 2018-02-08 23:00 – Updated: 2025-10-21 23:45

CISA Previdian

Summary

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-07 14:03 UTC

CWE

n/a
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

mitre mitre root

References

14 references

URL	Tags
https://exim.org/static/doc/security/CVE-2018-6789.txt	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2018/02/07/2	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3565-1/	vendor-advisoryx_refsource_UBUNTU
http://openwall.com/lists/oss-security/2018/02/10/2	x_refsource_CONFIRM
http://www.securitytracker.com/id/1040461	vdb-entryx_refsource_SECTRACK
https://www.debian.org/security/2018/dsa-4110	vendor-advisoryx_refsource_DEBIAN
https://www.exploit-db.com/exploits/44571/	exploitx_refsource_EXPLOIT-DB
https://lists.debian.org/debian-lts-announce/2018…	mailing-listx_refsource_MLIST
https://git.exim.org/exim.git/commit/cf3cd306062a…	x_refsource_CONFIRM
https://devco.re/blog/2018/03/06/exim-off-by-one-…	x_refsource_MISC
http://www.securityfocus.com/bid/103049	vdb-entryx_refsource_BID
https://www.exploit-db.com/exploits/45671/	exploitx_refsource_EXPLOIT-DB
http://packetstormsecurity.com/files/162959/Exim-…	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Date Public

2018-02-07 00:00

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 1fbbe53f-5650-4ee1-a3ee-48f947be2570

Vulnerability ID: CVE-2018-6789

Status: Confirmed

Status Updated: 2021-11-03 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2021-11-03

Asserted: 2021-11-03

Scope

Notes: KEV entry: Exim Buffer Overflow Vulnerability | Affected: Exim / Exim | Description: Exim contains a buffer overflow vulnerability in the base64d function part of the SMTP listener that may allow for remote code execution. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2018-6789

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-119
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	Exim
Due Date	2022-05-03
Date Added	2021-11-03
Vendorproject	Exim
Vulnerabilityname	Exim Buffer Overflow Vulnerability
Knownransomwarecampaignuse	Known

References

CVE-2018-6789

Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 07e2edd6-aadb-4373-bb09-8a85742f13c3

Vulnerability ID: CVE-2018-6789

Status: Confirmed

Status Updated: 2021-11-03 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2021-11-03

Asserted: 2021-11-03

Scope

Notes: KEVIntel entry: An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may... | Affected: Exim / Exim | CVSS: 9.8 (CRITICAL) | Used in malware: yes | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may...
Vendor	Exim
Product	Exim
Added Date	2021-11-03T00:00:00.000Z
Cvss Score	9.8
Epss Score	None
Cvss Severity	CRITICAL
Epss Percentile	None
Used In Malware	yes
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	False

References

Created: 2026-06-23 14:04 UTC | Updated: 2026-07-10 06:14 UTC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T06:10:11.343Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
          },
          {
            "name": "[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
          },
          {
            "name": "USN-3565-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3565-1/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
          },
          {
            "name": "1040461",
            "tags": [
              "vdb-entry",
              "x_refsource_SECTRACK",
              "x_transferred"
            ],
            "url": "http://www.securitytracker.com/id/1040461"
          },
          {
            "name": "DSA-4110",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2018/dsa-4110"
          },
          {
            "name": "44571",
            "tags": [
              "exploit",
              "x_refsource_EXPLOIT-DB",
              "x_transferred"
            ],
            "url": "https://www.exploit-db.com/exploits/44571/"
          },
          {
            "name": "[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
          },
          {
            "name": "103049",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/103049"
          },
          {
            "name": "45671",
            "tags": [
              "exploit",
              "x_refsource_EXPLOIT-DB",
              "x_transferred"
            ],
            "url": "https://www.exploit-db.com/exploits/45671/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2018-6789",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-07T14:03:40.827397Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2021-11-03",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789"
              },
              "type": "kev"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-120",
                "description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:45:56.260Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2021-11-03T00:00:00.000Z",
            "value": "CVE-2018-6789 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2018-02-07T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-06-03T17:06:14.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
        },
        {
          "name": "[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
        },
        {
          "name": "USN-3565-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/3565-1/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
        },
        {
          "name": "1040461",
          "tags": [
            "vdb-entry",
            "x_refsource_SECTRACK"
          ],
          "url": "http://www.securitytracker.com/id/1040461"
        },
        {
          "name": "DSA-4110",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2018/dsa-4110"
        },
        {
          "name": "44571",
          "tags": [
            "exploit",
            "x_refsource_EXPLOIT-DB"
          ],
          "url": "https://www.exploit-db.com/exploits/44571/"
        },
        {
          "name": "[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
        },
        {
          "name": "103049",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/103049"
        },
        {
          "name": "45671",
          "tags": [
            "exploit",
            "x_refsource_EXPLOIT-DB"
          ],
          "url": "https://www.exploit-db.com/exploits/45671/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2018-6789",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://exim.org/static/doc/security/CVE-2018-6789.txt",
              "refsource": "CONFIRM",
              "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
            },
            {
              "name": "[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
            },
            {
              "name": "USN-3565-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/3565-1/"
            },
            {
              "name": "http://openwall.com/lists/oss-security/2018/02/10/2",
              "refsource": "CONFIRM",
              "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
            },
            {
              "name": "1040461",
              "refsource": "SECTRACK",
              "url": "http://www.securitytracker.com/id/1040461"
            },
            {
              "name": "DSA-4110",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2018/dsa-4110"
            },
            {
              "name": "44571",
              "refsource": "EXPLOIT-DB",
              "url": "https://www.exploit-db.com/exploits/44571/"
            },
            {
              "name": "[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
            },
            {
              "name": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1",
              "refsource": "CONFIRM",
              "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
            },
            {
              "name": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/",
              "refsource": "MISC",
              "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
            },
            {
              "name": "103049",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/103049"
            },
            {
              "name": "45671",
              "refsource": "EXPLOIT-DB",
              "url": "https://www.exploit-db.com/exploits/45671/"
            },
            {
              "name": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2018-6789",
    "datePublished": "2018-02-08T23:00:00.000Z",
    "dateReserved": "2018-02-06T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:45:56.260Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2018-6789",
      "cwes": "[\"CWE-119\"]",
      "dateAdded": "2021-11-03",
      "dueDate": "2022-05-03",
      "forensicTriage": "No",
      "knownRansomwareCampaignUse": "Known",
      "notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-6789",
      "product": "Exim",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Exim contains a buffer overflow vulnerability in the base64d function part of the SMTP listener that may allow for remote code execution.",
      "vendorProject": "Exim",
      "vulnerabilityName": "Exim Buffer Overflow Vulnerability"
    },
    "epss": {
      "cve": "CVE-2018-6789",
      "date": "2026-09-16",
      "epss": "0.82137",
      "percentile": "0.99637"
    },
    "fkie_nvd": {
      "cisaActionDue": "2022-05-03",
      "cisaExploitAdd": "2021-11-03",
      "cisaRequiredAction": "Apply updates per vendor instructions.",
      "cisaVulnerabilityName": "Exim Buffer Overflow Vulnerability",
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"4.90.1\", \"matchCriteriaId\": \"EC35DD1C-8421-443D-9EBC-73F1C7B7306E\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"16F59A04-14CF-49E2-9973-645477EA09DA\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"DEECE5FC-CACF-4496-A3E7-164736409252\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*\", \"matchCriteriaId\": \"815D70A8-47D3-459C-A32C-9FEACA0659D1\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*\", \"matchCriteriaId\": \"7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"9070C9D8-A14A-467F-8253-33B966C16886\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.\"}, {\"lang\": \"es\", \"value\": \"Se ha descubierto un problema en la funci\\u00f3n base64d en el escuchador SMTP en Exim, en versiones anteriores a la 4.90.1. Al enviar un mensaje manipulado, podr\\u00eda ocurrir un desbordamiento de b\\u00fafer. Esto puede emplearse para ejecutar c\\u00f3digo de forma remota.\"}]",
      "id": "CVE-2018-6789",
      "lastModified": "2024-11-21T04:11:12.213",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:P/I:P/A:P\", \"baseScore\": 7.5, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 10.0, \"impactScore\": 6.4, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2018-02-08T23:29:01.170",
      "references": "[{\"url\": \"http://openwall.com/lists/oss-security/2018/02/10/2\", \"source\": \"cve@mitre.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\", \"source\": \"cve@mitre.org\", \"tags\": [\"Exploit\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2018/02/07/2\", \"source\": \"cve@mitre.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://www.securityfocus.com/bid/103049\", \"source\": \"cve@mitre.org\", \"tags\": [\"Broken Link\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.securitytracker.com/id/1040461\", \"source\": \"cve@mitre.org\", \"tags\": [\"Broken Link\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Exploit\", \"Third Party Advisory\"]}, {\"url\": \"https://exim.org/static/doc/security/CVE-2018-6789.txt\", \"source\": \"cve@mitre.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\", \"source\": \"cve@mitre.org\", \"tags\": [\"Patch\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\", \"source\": \"cve@mitre.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://usn.ubuntu.com/3565-1/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.debian.org/security/2018/dsa-4110\", \"source\": \"cve@mitre.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://www.exploit-db.com/exploits/44571/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Exploit\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://www.exploit-db.com/exploits/45671/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Exploit\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://openwall.com/lists/oss-security/2018/02/10/2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2018/02/07/2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://www.securityfocus.com/bid/103049\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Broken Link\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.securitytracker.com/id/1040461\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Broken Link\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Third Party Advisory\"]}, {\"url\": \"https://exim.org/static/doc/security/CVE-2018-6789.txt\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://usn.ubuntu.com/3565-1/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.debian.org/security/2018/dsa-4110\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://www.exploit-db.com/exploits/44571/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://www.exploit-db.com/exploits/45671/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Third Party Advisory\", \"VDB Entry\"]}]",
      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-120\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-6789\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2018-02-08T23:29:01.170\",\"lastModified\":\"2025-11-07T19:04:28.453\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.\"},{\"lang\":\"es\",\"value\":\"Se ha descubierto un problema en la funci\u00f3n base64d en el escuchador SMTP en Exim, en versiones anteriores a la 4.90.1. Al enviar un mensaje manipulado, podr\u00eda ocurrir un desbordamiento de b\u00fafer. Esto puede emplearse para ejecutar c\u00f3digo de forma remota.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":7.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":10.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"cisaExploitAdd\":\"2021-11-03\",\"cisaActionDue\":\"2022-05-03\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Exim Buffer Overflow Vulnerability\",\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.90.1\",\"matchCriteriaId\":\"EC35DD1C-8421-443D-9EBC-73F1C7B7306E\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"16F59A04-14CF-49E2-9973-645477EA09DA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DEECE5FC-CACF-4496-A3E7-164736409252\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*\",\"matchCriteriaId\":\"815D70A8-47D3-459C-A32C-9FEACA0659D1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*\",\"matchCriteriaId\":\"7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9070C9D8-A14A-467F-8253-33B966C16886\"}]}]}],\"references\":[{\"url\":\"http://openwall.com/lists/oss-security/2018/02/10/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2018/02/07/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/103049\",\"source\":\"cve@mitre.org\",\"tags\":[\"Broken Link\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.securitytracker.com/id/1040461\",\"source\":\"cve@mitre.org\",\"tags\":[\"Broken Link\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://exim.org/static/doc/security/CVE-2018-6789.txt\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3565-1/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2018/dsa-4110\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.exploit-db.com/exploits/44571/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://www.exploit-db.com/exploits/45671/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://openwall.com/lists/oss-security/2018/02/10/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2018/02/07/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/103049\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.securitytracker.com/id/1040461\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://exim.org/static/doc/security/CVE-2018-6789.txt\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3565-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2018/dsa-4110\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.exploit-db.com/exploits/44571/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://www.exploit-db.com/exploits/45671/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"US Government Resource\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Critical",
      "current_release_date": "2026-01-09T09:05:19+00:00",
      "cve": "CVE-2018-6789",
      "id": "CVE-2018-6789",
      "initial_release_date": "2018-02-07T00:00:00+00:00",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "exim: buffer overflow in b64decode() function, possibly leading to remote code execution",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-6789.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "critical",
      "current_release_date": "2025-03-15T12:30:45Z",
      "cve": "CVE-2018-6789",
      "id": "CVE-2018-6789",
      "initial_release_date": "2023-02-15T04:30:15Z",
      "product_status:recommended": "18",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2018-6789",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-6789.json",
      "version": "8"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://exim.org/static/doc/security/CVE-2018-6789.txt\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2018/02/07/2\", \"name\": \"[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow\", \"tags\": [\"mailing-list\", \"x_refsource_MLIST\", \"x_transferred\"]}, {\"url\": \"https://usn.ubuntu.com/3565-1/\", \"name\": \"USN-3565-1\", \"tags\": [\"vendor-advisory\", \"x_refsource_UBUNTU\", \"x_transferred\"]}, {\"url\": \"http://openwall.com/lists/oss-security/2018/02/10/2\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"http://www.securitytracker.com/id/1040461\", \"name\": \"1040461\", \"tags\": [\"vdb-entry\", \"x_refsource_SECTRACK\", \"x_transferred\"]}, {\"url\": \"https://www.debian.org/security/2018/dsa-4110\", \"name\": \"DSA-4110\", \"tags\": [\"vendor-advisory\", \"x_refsource_DEBIAN\", \"x_transferred\"]}, {\"url\": \"https://www.exploit-db.com/exploits/44571/\", \"name\": \"44571\", \"tags\": [\"exploit\", \"x_refsource_EXPLOIT-DB\", \"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\", \"name\": \"[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update\", \"tags\": [\"mailing-list\", \"x_refsource_MLIST\", \"x_transferred\"]}, {\"url\": \"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"http://www.securityfocus.com/bid/103049\", \"name\": \"103049\", \"tags\": [\"vdb-entry\", \"x_refsource_BID\", \"x_transferred\"]}, {\"url\": \"https://www.exploit-db.com/exploits/45671/\", \"name\": \"45671\", \"tags\": [\"exploit\", \"x_refsource_EXPLOIT-DB\", \"x_transferred\"]}, {\"url\": \"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-05T06:10:11.343Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2018-6789\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-07T14:03:40.827397Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2021-11-03\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789\"}}}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2021-11-03T00:00:00.000Z\", \"value\": \"CVE-2018-6789 added to CISA KEV\"}], \"references\": [{\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789\", \"tags\": [\"government-resource\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-120\", \"description\": \"CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-07T14:03:34.340Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"datePublic\": \"2018-02-07T00:00:00.000Z\", \"references\": [{\"url\": \"https://exim.org/static/doc/security/CVE-2018-6789.txt\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2018/02/07/2\", \"name\": \"[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow\", \"tags\": [\"mailing-list\", \"x_refsource_MLIST\"]}, {\"url\": \"https://usn.ubuntu.com/3565-1/\", \"name\": \"USN-3565-1\", \"tags\": [\"vendor-advisory\", \"x_refsource_UBUNTU\"]}, {\"url\": \"http://openwall.com/lists/oss-security/2018/02/10/2\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"http://www.securitytracker.com/id/1040461\", \"name\": \"1040461\", \"tags\": [\"vdb-entry\", \"x_refsource_SECTRACK\"]}, {\"url\": \"https://www.debian.org/security/2018/dsa-4110\", \"name\": \"DSA-4110\", \"tags\": [\"vendor-advisory\", \"x_refsource_DEBIAN\"]}, {\"url\": \"https://www.exploit-db.com/exploits/44571/\", \"name\": \"44571\", \"tags\": [\"exploit\", \"x_refsource_EXPLOIT-DB\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\", \"name\": \"[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update\", \"tags\": [\"mailing-list\", \"x_refsource_MLIST\"]}, {\"url\": \"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"http://www.securityfocus.com/bid/103049\", \"name\": \"103049\", \"tags\": [\"vdb-entry\", \"x_refsource_BID\"]}, {\"url\": \"https://www.exploit-db.com/exploits/45671/\", \"name\": \"45671\", \"tags\": [\"exploit\", \"x_refsource_EXPLOIT-DB\"]}, {\"url\": \"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2021-06-03T17:06:14.000Z\"}, \"x_legacyV4Record\": {\"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"n/a\"}]}, \"product_name\": \"n/a\"}]}, \"vendor_name\": \"n/a\"}]}}, \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://exim.org/static/doc/security/CVE-2018-6789.txt\", \"name\": \"https://exim.org/static/doc/security/CVE-2018-6789.txt\", \"refsource\": \"CONFIRM\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2018/02/07/2\", \"name\": \"[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow\", \"refsource\": \"MLIST\"}, {\"url\": \"https://usn.ubuntu.com/3565-1/\", \"name\": \"USN-3565-1\", \"refsource\": \"UBUNTU\"}, {\"url\": \"http://openwall.com/lists/oss-security/2018/02/10/2\", \"name\": \"http://openwall.com/lists/oss-security/2018/02/10/2\", \"refsource\": \"CONFIRM\"}, {\"url\": \"http://www.securitytracker.com/id/1040461\", \"name\": \"1040461\", \"refsource\": \"SECTRACK\"}, {\"url\": \"https://www.debian.org/security/2018/dsa-4110\", \"name\": \"DSA-4110\", \"refsource\": \"DEBIAN\"}, {\"url\": \"https://www.exploit-db.com/exploits/44571/\", \"name\": \"44571\", \"refsource\": \"EXPLOIT-DB\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html\", \"name\": \"[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update\", \"refsource\": \"MLIST\"}, {\"url\": \"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\", \"name\": \"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\", \"name\": \"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/\", \"refsource\": \"MISC\"}, {\"url\": \"http://www.securityfocus.com/bid/103049\", \"name\": \"103049\", \"refsource\": \"BID\"}, {\"url\": \"https://www.exploit-db.com/exploits/45671/\", \"name\": \"45671\", \"refsource\": \"EXPLOIT-DB\"}, {\"url\": \"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\", \"name\": \"http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html\", \"refsource\": \"MISC\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"n/a\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2018-6789\", \"STATE\": \"PUBLIC\", \"ASSIGNER\": \"cve@mitre.org\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2018-6789\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:45:56.260Z\", \"dateReserved\": \"2018-02-06T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2018-02-08T23:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

CERTFR-2018-ALE-004

Vulnerability from certfr_alerte - Published: - Updated:

Le 5 février 2018, la société de sécurité Devcore a informé l'éditeur du serveur de messagerie Exim d'une vulnérabilité dans leur produit. Cette vulnérabilité identifiée en tant que CVE-2018-6789 permet à un attaquant de provoquer une exécution de code arbitraire à distance sur un serveur Exim vulnérable.

La CVE-2018-6789 exploite une faille de type débordement de mémoire sur un seul octet ("off-by-one") présente dans toutes les versions du serveur de messagerie pour compromettre l'application. Les détails techniques sur la vulnérabilité ont par ailleurs fait l'objet d'une publication le 6 mars 2018 par le chercheur en sécurité à l'origine de cette découverte (cf. section Documentation).

Solution

La version 4.90.1, disponible depuis le 10 février 2018, intègre le correctif de sécurité pour la vulnérabilité CVE-2018-6789.

Le CERT-FR recommande la mise à jour immédiate d'Exim.

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Exim	N/A	Exim toutes versions antérieures à 4.90.1

References

Title

Publication Time

CERTFR-2018-ALE-004

Vulnerability from certfr_alerte - Published: - Updated:

Solution

La version 4.90.1, disponible depuis le 10 février 2018, intègre le correctif de sécurité pour la vulnérabilité CVE-2018-6789.

Le CERT-FR recommande la mise à jour immédiate d'Exim.

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Exim	N/A	Exim toutes versions antérieures à 4.90.1

References

Title

Publication Time

CNVD-2018-04619

Vulnerability from cnvd - Published: 2018-03-08

Title

Exim SMTP Mail Server缓冲区溢出漏洞

Description

Exim是一个MTA（Mail Transfer Agent，邮件传输代理）服务器软件，该软件基于GPL协议开发，是一款开源软件。该软件主要运行于类UNIX系统。通常该软件会与Dovecot或Courier等软件搭配使用。 Exim 4.90.1之前版本中的SMTPSMTP侦听器'base64d()'解码函数在发送handcrafted消息时存在缓冲区溢出漏洞，攻击者可利用该漏洞在受影响的应用程序上下文中执行任意代码，若攻击尝试失败仍可导致拒绝服务条件。

Severity

高

Patch Name

Exim SMTP Mail Server缓冲区溢出漏洞的补丁

Patch Description

Exim是在剑桥大学开发的消息传输代理（MTA），用于连接到互联网的Unix系统。 Exim 4.90.1之前版本中的SMTP侦听器'base64d()'解码函数在发送handcrafted消息时存在缓冲区溢出漏洞，攻击者可利用该漏洞在受影响的应用程序上下文中执行任意代码，若攻击尝试失败仍可导致拒绝服务条件。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已经发布了升级补丁以修复此安全问题，补丁获取链接： https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2018-6789

Impacted products

Name
Exim Exim <4.90.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-6789"
    }
  },
  "description": "Exim\u662f\u4e00\u4e2aMTA\uff08Mail Transfer Agent\uff0c\u90ae\u4ef6\u4f20\u8f93\u4ee3\u7406\uff09\u670d\u52a1\u5668\u8f6f\u4ef6\uff0c\u8be5\u8f6f\u4ef6\u57fa\u4e8eGPL\u534f\u8bae\u5f00\u53d1\uff0c\u662f\u4e00\u6b3e\u5f00\u6e90\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u4e3b\u8981\u8fd0\u884c\u4e8e\u7c7bUNIX\u7cfb\u7edf\u3002\u901a\u5e38\u8be5\u8f6f\u4ef6\u4f1a\u4e0eDovecot\u6216Courier\u7b49\u8f6f\u4ef6\u642d\u914d\u4f7f\u7528\u3002\r\n\r\nExim 4.90.1\u4e4b\u524d\u7248\u672c\u4e2d\u7684SMTPSMTP\u4fa6\u542c\u5668\u0027base64d()\u0027\u89e3\u7801\u51fd\u6570\u5728\u53d1\u9001handcrafted\u6d88\u606f\u65f6\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u53d7\u5f71\u54cd\u7684\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u4efb\u610f\u4ee3\u7801\uff0c\u82e5\u653b\u51fb\u5c1d\u8bd5\u5931\u8d25\u4ecd\u53ef\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u6761\u4ef6\u3002",
  "discovererName": "Meh Chang",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a \r\nhttps://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-04619",
  "openTime": "2018-03-08",
  "patchDescription": "Exim\u662f\u5728\u5251\u6865\u5927\u5b66\u5f00\u53d1\u7684\u6d88\u606f\u4f20\u8f93\u4ee3\u7406\uff08MTA\uff09\uff0c\u7528\u4e8e\u8fde\u63a5\u5230\u4e92\u8054\u7f51\u7684Unix\u7cfb\u7edf\u3002\r\n\r\nExim 4.90.1\u4e4b\u524d\u7248\u672c\u4e2d\u7684SMTP\u4fa6\u542c\u5668\u0027base64d()\u0027\u89e3\u7801\u51fd\u6570\u5728\u53d1\u9001handcrafted\u6d88\u606f\u65f6\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u53d7\u5f71\u54cd\u7684\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u4efb\u610f\u4ee3\u7801\uff0c\u82e5\u653b\u51fb\u5c1d\u8bd5\u5931\u8d25\u4ecd\u53ef\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u6761\u4ef6\u3002 \u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Exim SMTP Mail Server\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Exim Exim \u003c4.90.1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-6789",
  "serverity": "\u9ad8",
  "submitTime": "2018-02-09",
  "title": "Exim SMTP Mail Server\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

FKIE_CVE-2018-6789

Vulnerability from fkie_nvd - Published: 2018-02-08 23:29 - Updated: 2026-06-17 02:02

CISA Previdian

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

References

URL	Tags
cve@mitre.org	http://openwall.com/lists/oss-security/2018/02/10/2	Mailing List, Third Party Advisory
cve@mitre.org	http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html	Exploit, Third Party Advisory, VDB Entry
cve@mitre.org	http://www.openwall.com/lists/oss-security/2018/02/07/2	Mailing List, Third Party Advisory
cve@mitre.org	http://www.securityfocus.com/bid/103049	Broken Link, Third Party Advisory, VDB Entry
cve@mitre.org	http://www.securitytracker.com/id/1040461	Broken Link, Third Party Advisory, VDB Entry
cve@mitre.org	https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/	Exploit, Third Party Advisory
cve@mitre.org	https://exim.org/static/doc/security/CVE-2018-6789.txt	Vendor Advisory
cve@mitre.org	https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1	Patch
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html	Mailing List, Third Party Advisory
cve@mitre.org	https://usn.ubuntu.com/3565-1/	Third Party Advisory
cve@mitre.org	https://www.debian.org/security/2018/dsa-4110	Mailing List, Third Party Advisory
cve@mitre.org	https://www.exploit-db.com/exploits/44571/	Exploit, Third Party Advisory, VDB Entry
cve@mitre.org	https://www.exploit-db.com/exploits/45671/	Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	http://openwall.com/lists/oss-security/2018/02/10/2	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html	Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2018/02/07/2	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.securityfocus.com/bid/103049	Broken Link, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	http://www.securitytracker.com/id/1040461	Broken Link, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://exim.org/static/doc/security/CVE-2018-6789.txt	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://usn.ubuntu.com/3565-1/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.debian.org/security/2018/dsa-4110	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.exploit-db.com/exploits/44571/	Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	https://www.exploit-db.com/exploits/45671/	Exploit, Third Party Advisory, VDB Entry
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789	US Government Resource

Impacted products

Vendor	Product	Version
exim	exim	*
debian	debian_linux	7.0
debian	debian_linux	8.0
debian	debian_linux	9.0
canonical	ubuntu_linux	14.04
canonical	ubuntu_linux	16.04
canonical	ubuntu_linux	17.10

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cisaActionDue": "2022-05-03",
  "cisaExploitAdd": "2021-11-03",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Exim Buffer Overflow Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EC35DD1C-8421-443D-9EBC-73F1C7B7306E",
              "versionEndExcluding": "4.90.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
              "matchCriteriaId": "815D70A8-47D3-459C-A32C-9FEACA0659D1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
              "matchCriteriaId": "7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*",
              "matchCriteriaId": "9070C9D8-A14A-467F-8253-33B966C16886",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en la funci\u00f3n base64d en el escuchador SMTP en Exim, en versiones anteriores a la 4.90.1. Al enviar un mensaje manipulado, podr\u00eda ocurrir un desbordamiento de b\u00fafer. Esto puede emplearse para ejecutar c\u00f3digo de forma remota."
    }
  ],
  "id": "CVE-2018-6789",
  "lastModified": "2026-06-17T02:02:17.180",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2018-6789",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-07T14:03:40.827397Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2018-02-08T23:29:01.170",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/103049"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1040461"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://usn.ubuntu.com/3565-1/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.debian.org/security/2018/dsa-4110"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://www.exploit-db.com/exploits/44571/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://www.exploit-db.com/exploits/45671/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/103049"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1040461"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://usn.ubuntu.com/3565-1/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.debian.org/security/2018/dsa-4110"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://www.exploit-db.com/exploits/44571/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://www.exploit-db.com/exploits/45671/"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

GHSA-868P-WR6F-7JFR

Vulnerability from github – Published: 2022-05-13 01:09 – Updated: 2025-10-22 00:31

Details

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Severity

9.8 (Critical)


                  
                    CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2018-6789"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119",
      "CWE-120"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-02-08T23:29:00Z",
    "severity": "CRITICAL"
  },
  "details": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.",
  "id": "GHSA-868p-wr6f-7jfr",
  "modified": "2025-10-22T00:31:29Z",
  "published": "2022-05-13T01:09:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-6789"
    },
    {
      "type": "WEB",
      "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en"
    },
    {
      "type": "WEB",
      "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
    },
    {
      "type": "WEB",
      "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3565-1"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2018/dsa-4110"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/44571"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/45671"
    },
    {
      "type": "WEB",
      "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/103049"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1040461"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2018-6789

Vulnerability from gsd - Updated: 2023-12-13 01:22

Details

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Aliases

CVE-2018-6789

Aliases

CVE-2018-6789

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2018-6789",
    "description": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.",
    "id": "GSD-2018-6789",
    "references": [
      "https://www.suse.com/security/cve/CVE-2018-6789.html",
      "https://www.debian.org/security/2018/dsa-4110",
      "https://ubuntu.com/security/CVE-2018-6789",
      "https://security.archlinux.org/CVE-2018-6789",
      "https://alas.aws.amazon.com/cve/html/CVE-2018-6789.html",
      "https://packetstormsecurity.com/files/cve/CVE-2018-6789"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-6789"
      ],
      "details": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.",
      "id": "GSD-2018-6789",
      "modified": "2023-12-13T01:22:35.558553Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cisa.gov": {
      "cveID": "CVE-2018-6789",
      "dateAdded": "2021-11-03",
      "dueDate": "2022-05-03",
      "product": "Exim",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Issue in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.",
      "vendorProject": "Exim",
      "vulnerabilityName": "Exim Buffer Overflow Vulnerability"
    },
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2018-6789",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://exim.org/static/doc/security/CVE-2018-6789.txt",
            "refsource": "CONFIRM",
            "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
          },
          {
            "name": "[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
          },
          {
            "name": "USN-3565-1",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/3565-1/"
          },
          {
            "name": "http://openwall.com/lists/oss-security/2018/02/10/2",
            "refsource": "CONFIRM",
            "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
          },
          {
            "name": "1040461",
            "refsource": "SECTRACK",
            "url": "http://www.securitytracker.com/id/1040461"
          },
          {
            "name": "DSA-4110",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2018/dsa-4110"
          },
          {
            "name": "44571",
            "refsource": "EXPLOIT-DB",
            "url": "https://www.exploit-db.com/exploits/44571/"
          },
          {
            "name": "[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
          },
          {
            "name": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1",
            "refsource": "CONFIRM",
            "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
          },
          {
            "name": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/",
            "refsource": "MISC",
            "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
          },
          {
            "name": "103049",
            "refsource": "BID",
            "url": "http://www.securityfocus.com/bid/103049"
          },
          {
            "name": "45671",
            "refsource": "EXPLOIT-DB",
            "url": "https://www.exploit-db.com/exploits/45671/"
          },
          {
            "name": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html",
            "refsource": "MISC",
            "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "4.90.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2018-6789"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-119"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://exim.org/static/doc/security/CVE-2018-6789.txt",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://exim.org/static/doc/security/CVE-2018-6789.txt"
            },
            {
              "name": "[oss-security] 20180207 CVE-2018-6789 Exim 4.90 and earlier: buffer overflow",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2018/02/07/2"
            },
            {
              "name": "DSA-4110",
              "refsource": "DEBIAN",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.debian.org/security/2018/dsa-4110"
            },
            {
              "name": "[debian-lts-announce] 20180210 [SECURITY] [DLA 1274-1] exim4 security update",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
            },
            {
              "name": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1",
              "refsource": "CONFIRM",
              "tags": [
                "Patch",
                "Vendor Advisory"
              ],
              "url": "https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1"
            },
            {
              "name": "http://openwall.com/lists/oss-security/2018/02/10/2",
              "refsource": "CONFIRM",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://openwall.com/lists/oss-security/2018/02/10/2"
            },
            {
              "name": "103049",
              "refsource": "BID",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securityfocus.com/bid/103049"
            },
            {
              "name": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/",
              "refsource": "MISC",
              "tags": [
                "Technical Description",
                "Third Party Advisory"
              ],
              "url": "https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/"
            },
            {
              "name": "1040461",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1040461"
            },
            {
              "name": "USN-3565-1",
              "refsource": "UBUNTU",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://usn.ubuntu.com/3565-1/"
            },
            {
              "name": "44571",
              "refsource": "EXPLOIT-DB",
              "tags": [
                "Exploit",
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "https://www.exploit-db.com/exploits/44571/"
            },
            {
              "name": "45671",
              "refsource": "EXPLOIT-DB",
              "tags": [
                "Exploit",
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "https://www.exploit-db.com/exploits/45671/"
            },
            {
              "name": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html",
              "refsource": "MISC",
              "tags": [],
              "url": "http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 7.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2021-06-03T18:15Z",
      "publishedDate": "2018-02-08T23:29Z"
    }
  }
}

OPENSUSE-SU-2021:0677-1

Vulnerability from csaf_opensuse - Published: 2021-05-07 09:03 - Updated: 2021-05-07 09:03

Summary

Security update for exim

Severity

Critical

Scope

26 vulnerabilities in this advisory, including CVE-2018-6789.

CVE-2018-6789

9.8 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 3 products

Open the full advisory

OPENSUSE-SU-2021:0753-1

Vulnerability from csaf_opensuse - Published: 2021-05-20 08:50 - Updated: 2021-05-20 08:50

Summary

Security update for exim

Severity

Critical

Scope

30 vulnerabilities in this advisory, including CVE-2018-6789.

CVE-2018-6789

9.8 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 24 products

Open the full advisory

OPENSUSE-SU-2021:0754-1

Vulnerability from csaf_opensuse - Published: 2021-05-20 08:51 - Updated: 2021-05-20 08:51

Summary

Security update for exim

Severity

Critical

Scope

26 vulnerabilities in this advisory, including CVE-2018-6789.

CVE-2018-6789

9.8 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 24 products

Open the full advisory

OPENSUSE-SU-2024:10746-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2024-06-15 00:00

Summary

exim-4.94.2-4.2 on GA media

Severity

Moderate

Scope

31 vulnerabilities in this advisory, including CVE-2018-6789.

CVE-2018-6789

9.8 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 12 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2018-6789 (GCVE-0-2018-6789)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Confirmed Compromise Confidence: 70% Source: kevintel

Details

References

Solution

Solution

Tags

Sightings

Nomenclature

Related by attack behaviour