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Gentoo Linux Security Advisory                           GLSA 201612-31
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: exFAT: Multiple vulnerabilities
     Date: December 12, 2016
     Bugs: #563936
       ID: 201612-31

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Synopsis
========

Two vulnerabilities have been found in exFAT allowing remote attackers
to execute arbitrary code or cause Denial of Service.

Background
==========

A full-featured exFAT file system implementation for Unix-like systems.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-fs/exfat-utils           < 1.2.1                    >= 1.2.1

Description
===========

Two vulnerabilities were found in exFAT. A malformed input can cause a
write heap overflow or cause an endless loop.

Impact
======

Remote attackers could execute arbitrary code or cause Denial of
Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All exFAT users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-fs/exfat-utils-1.2.1"

References
==========

[ 1 ] CVE-2015-8026
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8026
[ 2 ] Heap overflow and endless loop in exfatfsck / exfat-utils

http://blog.fuzzing-project.org/25-Heap-overflow-and-endless-loop-in-exfatfsck-exfat-utils.html

Availability
============

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

 https://security.gentoo.org/glsa/201612-31

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 2016 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.

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