gsd-2020-8794
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
Aliases
Aliases
CVE-2020-8794


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-8794",
    "description": "OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.",
    "id": "GSD-2020-8794",
    "references": [
      "https://www.debian.org/security/2020/dsa-4634",
      "https://ubuntu.com/security/CVE-2020-8794",
      "https://security.archlinux.org/CVE-2020-8794",
      "https://packetstormsecurity.com/files/cve/CVE-2020-8794"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-8794"
      ],
      "details": "OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.",
      "id": "GSD-2020-8794",
      "modified": "2023-12-13T01:21:54.335347Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-8794",
        "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": "OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.openbsd.org/security.html",
            "refsource": "MISC",
            "url": "https://www.openbsd.org/security.html"
          },
          {
            "name": "https://www.openwall.com/lists/oss-security/2020/02/24/5",
            "refsource": "MISC",
            "url": "https://www.openwall.com/lists/oss-security/2020/02/24/5"
          },
          {
            "name": "[oss-security] 20200226 Re: LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2020/02/26/1"
          },
          {
            "name": "DSA-4634",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2020/dsa-4634"
          },
          {
            "name": "20200227 LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
            "refsource": "FULLDISC",
            "url": "http://seclists.org/fulldisclosure/2020/Feb/32"
          },
          {
            "name": "[oss-security] 20200301 Re: LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2020/03/01/1"
          },
          {
            "name": "[oss-security] 20200301 Re: LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2020/03/01/2"
          },
          {
            "name": "http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html",
            "refsource": "MISC",
            "url": "http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html"
          },
          {
            "name": "FEDORA-2020-b92d7083ca",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/"
          },
          {
            "name": "USN-4294-1",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/4294-1/"
          },
          {
            "name": "[oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "6.6.4",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-8794"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-125"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.openbsd.org/security.html",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.openbsd.org/security.html"
            },
            {
              "name": "https://www.openwall.com/lists/oss-security/2020/02/24/5",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://www.openwall.com/lists/oss-security/2020/02/24/5"
            },
            {
              "name": "[oss-security] 20200226 Re: LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
              "refsource": "MLIST",
              "tags": [
                "Exploit",
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2020/02/26/1"
            },
            {
              "name": "DSA-4634",
              "refsource": "DEBIAN",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.debian.org/security/2020/dsa-4634"
            },
            {
              "name": "20200227 LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
              "refsource": "FULLDISC",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://seclists.org/fulldisclosure/2020/Feb/32"
            },
            {
              "name": "[oss-security] 20200301 Re: LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2020/03/01/1"
            },
            {
              "name": "[oss-security] 20200301 Re: LPE and RCE in OpenSMTPD\u0027s default install (CVE-2020-8794)",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2020/03/01/2"
            },
            {
              "name": "http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html"
            },
            {
              "name": "FEDORA-2020-b92d7083ca",
              "refsource": "FEDORA",
              "tags": [
                "Mailing List",
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/"
            },
            {
              "name": "USN-4294-1",
              "refsource": "UBUNTU",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://usn.ubuntu.com/4294-1/"
            },
            {
              "name": "[oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim",
              "refsource": "MLIST",
              "tags": [
                "Exploit",
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 10.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 10.0,
          "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:3.1/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
        }
      },
      "lastModifiedDate": "2022-10-08T02:48Z",
      "publishedDate": "2020-02-25T17:15Z"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.