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

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

References

Bugs

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=980326

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