Vulnerability CVE-2021-3181
Published: 2021-01-19

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.

Type:

CWE-400

 (Uncontrolled Resource Consumption ('Resource Exhaustion'))

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
MUTT -> MUTT 
Debian -> Debian linux 

 References:
http://www.openwall.com/lists/oss-security/2021/01/19/10
http://www.openwall.com/lists/oss-security/2021/01/27/3
https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17
https://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19
https://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14
https://gitlab.com/muttmua/mutt/-/issues/323
https://lists.debian.org/debian-lts-announce/2021/01/msg00017.html
https://security.gentoo.org/glsa/202101-25
https://www.debian.org/security/2021/dsa-4838
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