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CVE-2021-3181

Published: 19 January 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.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
mutt
Launchpad, Ubuntu, Debian
upstream Needs triage

trusty Does not exist

bionic
Released (1.9.4-3ubuntu0.5)
focal
Released (1.13.2-1ubuntu0.4)
groovy
Released (1.14.6-1ubuntu0.2)
xenial
Released (1.5.24-1ubuntu0.6)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H