Bug 1926967 (CVE-2021-3403)

Summary:	CVE-2021-3403 ytnef: double free in TNEFSubjectHandler function in lib/ytnef.c via crafted file
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	itamar, sheltren
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	In ytnef 1.9.3, the TNEFSubjectHandler function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a double free which can be triggered via a crafted file.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-09 22:09:54 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:	1926968, 1926970
Bug Blocks:	1926973

Description Guilherme de Almeida Suckevicz 2021-02-09 18:44:58 UTC

In ytnef 1.9.3, the TNEFSubjectHandler function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a double free which can be triggered via a crafted file.

Reference:
https://github.com/Yeraze/ytnef/issues/85

Comment 1 Guilherme de Almeida Suckevicz 2021-02-09 18:45:17 UTC

Created ytnef tracking bugs for this issue:

Affects: epel-7 [bug 1926970]
Affects: fedora-all [bug 1926968]

Comment 2 Product Security DevOps Team 2021-02-09 22:09:54 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Comment 3 Guilherme de Almeida Suckevicz 2021-03-03 19:16:29 UTC

External References:

https://github.com/Yeraze/ytnef/issues/85