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CVE-2021-3181

Date: January 19, 2021

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.

Language: C

Severity Score

Related Resources (19)

https://nvd.nist.gov/vuln/detail/CVE-2021-3181
https://security.gentoo.org/glsa/202101-25
https://gitlab.com/muttmua/mutt/-/issues/323
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/
https://security-tracker.debian.org/tracker/CVE-2021-3181
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/
https://security.alpinelinux.org/vuln/CVE-2021-3181
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/
http://www.openwall.com/lists/oss-security/2021/01/27/3
https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17
https://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3181
https://www.debian.org/security/2021/dsa-4838
https://access.redhat.com/security/cve/CVE-2021-3181
http://www.openwall.com/lists/oss-security/2021/01/19/10
https://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19
https://lists.debian.org/debian-lts-announce/2021/01/msg00017.html
https://www.mend.io/vulnerability-database/CVE-2021-3181

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Missing Release of Memory after Effective Lifetime

CWE-401

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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