Bug 1920446 (CVE-2021-3181)

Summary:	CVE-2021-3181 mutt: Memory leak when parsing rfc822 group addresses
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	athoscribeiro, dakingun, databases-maint, fjanus, hhorak, jmmahler, me, mmuzila, panovotn, pkubat
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mutt 2.0.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 19:53:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1920451, 1932081
Bug Blocks:	1920453

Description Marian Rehak 2021-01-26 10:55:55 UTC

Remote attackers can 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 other email messages.

Reference:

https://gitlab.com/muttmua/mutt/-/issues/323

Comment 1 Marian Rehak 2021-01-26 10:57:06 UTC

Created mutt tracking bugs for this issue:

Affects: fedora-all [bug 1920451]

Comment 3 Tomas Hoger 2021-02-23 20:57:08 UTC

Upstream commit:
https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17

Note that the upstream report points out additional fixes that were made to further reduce memory usage when parsing malformed messages.

Comment 6 errata-xmlrpc 2021-11-09 17:36:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4181 https://access.redhat.com/errata/RHSA-2021:4181

Comment 7 Product Security DevOps Team 2021-11-09 19:53:57 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-3181