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Gentoo Linux Security Advisory                           GLSA 202104-06
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: libTIFF: Multiple vulnerabilities
      Date: April 30, 2021
      Bugs: #775125
        ID: 202104-06

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Synopsis
=======
Multiple vulnerabilities have been found in LibTIFF, the worst of which
could result in the execution of arbitrary code.

Background
=========
The TIFF library contains encoding and decoding routines for the Tag
Image File Format. It is called by numerous programs, including GNOME
and KDE applications, to interpret TIFF images.

Affected packages
================
     -------------------------------------------------------------------
      Package              /     Vulnerable     /            Unaffected
     -------------------------------------------------------------------
   1  media-libs/tiff              < 4.2.0                    >= 4.2.0

Description
==========
Multiple vulnerabilities have been discovered in LibTIFF. Please review
the referenced CVE identifiers for details.

Impact
=====
A remote attacker, by enticing the user to process a specially crafted
TIFF file, could possibly execute arbitrary code with the privileges of
the process, or cause a Denial of Service condition.

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

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

   # emerge --sync
   # emerge --ask --oneshot --verbose ">=media-libs/tiff-4.2.0"

References
=========
[ 1 ] CVE-2020-35521
       https://nvd.nist.gov/vuln/detail/CVE-2020-35521
[ 2 ] CVE-2020-35522
       https://nvd.nist.gov/vuln/detail/CVE-2020-35522
[ 3 ] CVE-2020-35523
       https://nvd.nist.gov/vuln/detail/CVE-2020-35523
[ 4 ] CVE-2020-35524
       https://nvd.nist.gov/vuln/detail/CVE-2020-35524

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

  https://security.gentoo.org/glsa/202104-06

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 2021 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/