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Gentoo Linux Security Advisory                           GLSA 201612-12
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Patch: Denial of Service
     Date: December 05, 2016
     Bugs: #538658
       ID: 201612-12

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Synopsis
=======
Patch is vulnerable to a locally generated Denial of Service condition.

Background
=========
Patch takes a patch file containing a difference listing produced by
the diff program and applies those differences to one or more original
files, producing patched versions.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-devel/patch              < 2.7.4                    >= 2.7.4 

Description
==========
Due to a flaw in Patch, the application can enter an infinite loop when
processing a specially crafted diff file.

Impact
=====
A local attacker could pass a specially crafted diff file to Patch,
possibly resulting in a Denial of Service condition.

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

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

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-devel/patch-2.7.4"

References
=========

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

 https://security.gentoo.org/glsa/201612-12

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.

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