ubuntu-cve-2021-3181
Vulnerability from osv_ubuntu
Published
2021-01-19 15:15
Modified
2025-09-08 16:46
Summary
Details

rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "mutt",
            "binary_version": "1.5.24-1ubuntu0.6"
          },
          {
            "binary_name": "mutt-patched",
            "binary_version": "1.5.24-1ubuntu0.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mutt",
        "purl": "pkg:deb/ubuntu/mutt@1.5.24-1ubuntu0.6?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.24-1ubuntu0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.23-3.1ubuntu1",
        "1.5.23-3.1ubuntu2",
        "1.5.24-1",
        "1.5.24-1build1",
        "1.5.24-1ubuntu0.1",
        "1.5.24-1ubuntu0.2",
        "1.5.24-1ubuntu0.3",
        "1.5.24-1ubuntu0.4",
        "1.5.24-1ubuntu0.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "mutt",
            "binary_version": "1.9.4-3ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "mutt",
        "purl": "pkg:deb/ubuntu/mutt@1.9.4-3ubuntu0.5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.4-3ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.3+neomutt20170609-2build1",
        "1.9.1-2",
        "1.9.1-3",
        "1.9.1-4",
        "1.9.1-5",
        "1.9.2-1",
        "1.9.3-1",
        "1.9.4-2",
        "1.9.4-3",
        "1.9.4-3ubuntu0.1",
        "1.9.4-3ubuntu0.2",
        "1.9.4-3ubuntu0.3",
        "1.9.4-3ubuntu0.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "mutt",
            "binary_version": "1.13.2-1ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "mutt",
        "purl": "pkg:deb/ubuntu/mutt@1.13.2-1ubuntu0.4?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.13.2-1ubuntu0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.1-2.1",
        "1.12.2-1",
        "1.12.2-2",
        "1.13.0-1",
        "1.13.2-1",
        "1.13.2-1ubuntu0.1",
        "1.13.2-1ubuntu0.2",
        "1.13.2-1ubuntu0.3"
      ]
    }
  ],
  "aliases": [],
  "details": "rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.",
  "id": "UBUNTU-CVE-2021-3181",
  "modified": "2025-09-08T16:46:43Z",
  "published": "2021-01-19T15:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3181"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.com/muttmua/mutt/-/issues/323"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2021/01/19/10"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4703-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-3181"
    }
  ],
  "related": [
    "USN-4703-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-3181"
  ]
}



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Sightings

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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.
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  • 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.


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