{"id":"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":"2026-08-07T16:50:22.998244Z","published":"2021-01-19T15:15:12.327Z","related":["ALSA-2021:4181","SUSE-SU-2021:0195-1","SUSE-SU-2021:0196-1","openSUSE-SU-2021:0161-1","openSUSE-SU-2021:0162-1","openSUSE-SU-2024:11069-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"9.0"},{"last_affected":"9.0"},{"introduced":"10.0"},{"last_affected":"10.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux"},{"cpes":["cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"32"},{"last_affected":"32"},{"introduced":"33"},{"last_affected":"33"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/01/19/10"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/01/27/3"},{"type":"ADVISORY","url":"https://gitlab.com/muttmua/mutt/-/issues/323"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/01/msg00017.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202101-25"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4838"},{"type":"FIX","url":"https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17"},{"type":"FIX","url":"https://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19"},{"type":"FIX","url":"https://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/muttmua/mutt","events":[{"introduced":"0"},{"last_affected":"26f41dd1f7678fc7e09ebc88167c4c6a51b6f4a5"}],"database_specific":{"cpe":"cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"2.0.4"}],"source":"CPE_RANGE"}}],"versions":["mutt-2-0-4-rel","mutt-2-0-3-rel","mutt-2-0-2-rel","mutt-2-0-1-rel","mutt-2-0-rel","mutt-1-14-rel","mutt-1-13-rel","mutt-1-12-rel","mutt-1-11-rel","mutt-1-10-rel","mutt-1-9-rel","mutt-1-8-rel","mutt-1-7-rel","mutt-1-6-rel","mutt-1-5-24-rel","mutt-1-5-22-rel","mutt-1-5-21-rel","mutt-1-5-20-rel","mutt-1-5-19-rel","mutt-1-5-18-rel","mutt-1-5-17-rel","mutt-1-5-16-rel","mutt-1-5-15-rel","mutt-1-5-6-rel","mutt-1-5-5-1-rel","mutt-1-5-5-rel","post-type-punning-patch","pre-type-punning-patch","mutt-1-5-4-rel","mutt-1-5-3-rel","mutt-1-5-2-rel","mutt-1-5-1-rel","mutt-1-3-27-rel","mutt-1-3-26-rel","mutt-1-3-25-rel","mutt-1-3-24-rel","mutt-1-3-23-2-rel","mutt-1-3-23-1-rel","mutt-1-3-23-rel","mutt-1-3-22-1-rel","mutt-1-3-22-rel","mutt-1-3-21-rel","mutt-1-3-20-rel","mutt-1-3-19-rel","mutt-1-3-18-rel","mutt-1-3-17-rel","mutt-1-3-16-rel","mutt-1-3-15-rel","mutt-1-3-14-rel","mutt-1-3-13-rel","mutt-1-3-12-rel","mutt-1-3-11-rel","mutt-1-3-10-rel","mutt-1-3-9-rel","mutt-1-3-8-rel","mutt-1-3-7-rel","mutt-1-3-6-rel","mutt-1-3-5-rel","mutt-1-3-4-rel","mutt-1-3-3-rel","mutt-1-3-2-rel","mutt-1-3-1-rel","mutt-1-3-rel","mutt-1-1-14-rel","mutt-1-1-13-rel","mutt-1-1-12-rel","mutt-1-1-11-rel","mutt-1-1-10-rel","mutt-1-1-9-rel","mutt-1-1-8-rel","mutt-1-1-7-rel","mutt-1-1-6-rel","mutt-1-1-5-rel","mutt-1-1-4-rel","mutt-1-1-3-rel","mutt-1-1-2-rel","mutt-1-1-1-2-rel","mutt-1-1-1-1-rel","mutt-1-1-1-rel","mutt-1-1-rel","mutt-0-96-8-rel","mutt-0-96-7-rel","mutt-0-96-6-rel","mutt-0-96-5-rel","mutt-0-96-4-rel","mutt-0-96-3-rel","mutt-0-96-2-slightly-post-release","mutt-0-96-1-rel","mutt-0-96-rel","mutt-0-95-rel","mutt-0-94-18-rel","mutt-0-94-17i-rel","mutt-0-94-16i-rel","mutt-0-94-15-rel","mutt-0-94-14-rel","mutt-0-94-13-rel","mutt-0-94-10i-rel","mutt-0-94-9i-p1","mutt-0-94-9i-rel","mutt-0-94-8i-rel","mutt-0-94-7i-rel","mutt-0-94-6i-rel","mutt-0-94-5i-rel","mutt-0-93-unstable","mutt-0-92-11i","mutt-0-92-10i","mutt-0-92-9i"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3181.json"}},{"ranges":[{"type":"GIT","repo":"https://gitlab.com/muttmua/mutt","events":[{"introduced":"0"},{"last_affected":"26f41dd1f7678fc7e09ebc88167c4c6a51b6f4a5"},{"fixed":"4a2becbdb4422aaffe3ce314991b9d670b7adf17"},{"fixed":"939b02b33ae29bc0d642570c1dcfd4b339037d19"},{"fixed":"d4305208955c5cdd9fe96dfa61e7c1e14e176a14"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.0.4"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*"}}],"versions":["mutt-2-0-4-rel","mutt-2-0-3-rel","mutt-2-0-2-rel","mutt-2-0-1-rel","mutt-2-0-rel","mutt-1-14-rel","mutt-1-13-rel","mutt-1-12-rel","mutt-1-11-rel","mutt-1-10-rel",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