CVE-2021-3181
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).
Does this matter?
Lower severity and a low EPSS score (2.80%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 2.80% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- mutt/mutt · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2021/01/19/10Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/01/27/3Mailing List, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17Patch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19Patch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14Patch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/issues/323Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/01/msg00017.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/
- https://security.gentoo.org/glsa/202101-25Third Party Advisory
- https://www.debian.org/security/2021/dsa-4838Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/01/19/10Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/01/27/3Mailing List, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17Patch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19Patch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14Patch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/issues/323Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/01/msg00017.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/
- https://security.gentoo.org/glsa/202101-25Third Party Advisory
- https://www.debian.org/security/2021/dsa-4838Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.