{"id":"UBUNTU-CVE-2021-3181","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.","modified":"2026-01-30T02:41:19.617658Z","published":"2021-01-19T15:15:00Z","related":["USN-4703-1"],"upstream":["CVE-2021-3181"],"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"}],"affected":[{"package":{"name":"mutt","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mutt@1.5.24-1ubuntu0.6?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.24-1ubuntu0.6"}]}],"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_version":"1.5.24-1ubuntu0.6","binary_name":"mutt"},{"binary_version":"1.5.24-1ubuntu0.6","binary_name":"mutt-patched"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3181.json"}},{"package":{"name":"mutt","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mutt@1.9.4-3ubuntu0.5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.4-3ubuntu0.5"}]}],"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_version":"1.9.4-3ubuntu0.5","binary_name":"mutt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3181.json"}},{"package":{"name":"mutt","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mutt@1.13.2-1ubuntu0.4?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.2-1ubuntu0.4"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.13.2-1ubuntu0.4","binary_name":"mutt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3181.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}