Vulnerability-Lookup

CVE-2016-8652 (GCVE-0-2016-8652)

Vulnerability from cvelistv5 – Published: 2017-02-16 18:00 – Updated: 2024-08-06 02:27

Summary

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

Severity

5.9 (Medium)


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

CWE

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1033 records in the last 180 days details

References

4 references

URL	Tags
http://www.securityfocus.com/bid/94639	vdb-entryx_refsource_BID
http://www.openwall.com/lists/oss-security/2016/12/02/4	mailing-listx_refsource_MLIST
http://dovecot.org/pipermail/dovecot-news/2016-De…	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2016/1…	mailing-listx_refsource_MLIST

Date Public

2016-12-02 00:00

Show details on NVD website

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CNVD-2016-11966

Vulnerability from cnvd - Published: 2016-12-07

Title

Dovecot auth组件远程拒绝服务漏洞

Description

Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。 Dovecot 2.2.25.1至2.2.26.1版本中的auth组件存在远程拒绝服务漏洞。攻击者可利用该漏洞造成拒绝服务。

Severity

中

Patch Name

Dovecot auth组件远程拒绝服务漏洞的补丁

Patch Description

Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。 Dovecot 2.2.25.1至2.2.26.1版本中的auth组件存在远程拒绝服务漏洞。攻击者可利用该漏洞造成拒绝服务。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，详情请关注厂商主页： http://www.dovecot.org/

Reference

http://www.securityfocus.com/bid/94639

Impacted products

Name
Dovecot Dovecot >=2.2.25.1，<=2.2.26.1

Show details on source website

JSON

To clipboard

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  "patchName": "Dovecot auth\u7ec4\u4ef6\u8fdc\u7a0b\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Dovecot Dovecot \u003e=2.2.25.1\uff0c\u003c=2.2.26.1"
  },
  "referenceLink": "http://www.securityfocus.com/bid/94639",
  "serverity": "\u4e2d",
  "submitTime": "2016-12-07",
  "title": "Dovecot auth\u7ec4\u4ef6\u8fdc\u7a0b\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

FKIE_CVE-2016-8652

Vulnerability from fkie_nvd - Published: 2017-02-17 02:59 - Updated: 2026-06-17 00:54

Severity

5.9 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

References

URL	Tags
secalert@redhat.com	http://dovecot.org/pipermail/dovecot-news/2016-December/000333.html	Release Notes, Vendor Advisory
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2016/12/02/4	Mailing List, Third Party Advisory
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2016/12/05/12	Mailing List, Third Party Advisory
secalert@redhat.com	http://www.securityfocus.com/bid/94639	Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	http://dovecot.org/pipermail/dovecot-news/2016-December/000333.html	Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2016/12/02/4	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2016/12/05/12	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.securityfocus.com/bid/94639	Third Party Advisory, VDB Entry

Impacted products

	Vendor	Product	Version
	dovecot	dovecot	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FF2F0687-214B-47D5-BA1A-439CF981620F",
              "versionEndIncluding": "2.2.27",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username."
    },
    {
      "lang": "es",
      "value": "El componente de autenticaci\u00f3n en Dovecot en versiones anteriores a 2.2.27, cuando la pol\u00edtica de autenticaci\u00f3n es configurada, permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda) abortando la autenticaci\u00f3n sin establecer un nombre de usuario."
    }
  ],
  "id": "CVE-2016-8652",
  "lastModified": "2026-06-17T00:54:44.927",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2017-02-17T02:59:13.547",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "http://dovecot.org/pipermail/dovecot-news/2016-December/000333.html"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/12/02/4"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/12/05/12"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/94639"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "http://dovecot.org/pipermail/dovecot-news/2016-December/000333.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/12/02/4"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/12/05/12"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/94639"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-VM4W-QXVR-6WFP

Vulnerability from github – Published: 2022-05-17 02:58 – Updated: 2022-05-17 02:58

Details

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

Severity

5.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2016-8652"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-02-17T02:59:00Z",
    "severity": "MODERATE"
  },
  "details": "The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.",
  "id": "GHSA-vm4w-qxvr-6wfp",
  "modified": "2022-05-17T02:58:01Z",
  "published": "2022-05-17T02:58:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-8652"
    },
    {
      "type": "WEB",
      "url": "http://dovecot.org/pipermail/dovecot-news/2016-December/000333.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/12/02/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/12/05/12"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/94639"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2016-8652

Vulnerability from gsd - Updated: 2023-12-13 01:21

Details

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

Aliases

CVE-2016-8652

Aliases

CVE-2016-8652

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2016-8652",
    "description": "The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.",
    "id": "GSD-2016-8652",
    "references": [
      "https://www.suse.com/security/cve/CVE-2016-8652.html",
      "https://security.archlinux.org/CVE-2016-8652"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2016-8652"
      ],
      "details": "The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.",
      "id": "GSD-2016-8652",
      "modified": "2023-12-13T01:21:22.703592Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2016-8652",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
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          },
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            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/12/02/4"
          },
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            "name": "[dovecot-news] 20161203 v2.2.27 released",
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          },
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            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/12/05/12"
          }
        ]
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    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "2.2.27",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
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      "cve": {
        "CVE_data_meta": {
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        "description": {
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              "value": "The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username."
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            {
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            },
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            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
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          "severity": "MEDIUM",
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        },
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            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2017-02-22T19:11Z",
      "publishedDate": "2017-02-17T02:59Z"
    }
  }
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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-2016-8652 (GCVE-0-2016-8652)

CNVD-2016-11966

FKIE_CVE-2016-8652

GHSA-VM4W-QXVR-6WFP

GSD-2016-8652

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Sightings

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