- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 202405-24
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                           https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: ytnef: Multiple Vulnerabilities
     Date: May 08, 2024
     Bugs: #774255
       ID: 202405-24

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======
Multiple vulnerabilities have been discovered in ytnef, the worst of
which could potentially lead to remote code execution.

Background
=========
ytnef is a TNEF stream reader for reading winmail.dat files.

Affected packages
================
Package         Vulnerable    Unaffected
--------------  ------------  ------------
net-mail/ytnef  < 2.0         >= 2.0

Description
==========
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.

The SwapWord function in lib/ytnef.c allows remote attackers to cause a
denial-of-service (and potentially code execution) due to a heap buffer
overflow which can be triggered via a crafted file.

Impact
=====
Please review the referenced CVE identifiers for details.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All ytnef users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-mail/ytnef-2.0"

References
=========
[ 1 ] CVE-2021-3403
      https://nvd.nist.gov/vuln/detail/CVE-2021-3403
[ 2 ] CVE-2021-3404
      https://nvd.nist.gov/vuln/detail/CVE-2021-3404

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202405-24

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2024 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5