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[gentoo-announce] [ GLSA 201402-19 ] libtar: Arbitraty code execution

Posted on 21 February 2014
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201402-19
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http://security.gentoo.org/
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Severity: Normal
Title: libtar: Arbitraty code execution
Date: February 21, 2014
Bugs: #487420
ID: 201402-19

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Synopsis
========
A buffer overflow in libtar might allow remote attackers to execute
arbitrary code or cause a Denial of Service condition.

Background
==========
libtar is a C library for manipulating POSIX tar files.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/libtar < 1.2.20-r2 >= 1.2.20-r2

Description
===========
An integer overflow error within the =E2=80=9Cth_read()=E2=80=9D function= when
processing long names or link extensions can be exploited to cause a
heap-based buffer overflow via a specially crafted archive.

Impact
======
A remote attacker could entice a user to open a specially crafted file
using a program linked against libtar, possibly resulting in execution
of arbitrary code with the privileges of the process or a Denial of
Service condition.

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

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

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libtar-1.2.20-r2"

References
==========
[ 1 ] CVE-2013-4397
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4397

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

http://security.gentoo.org/glsa/glsa-201402-19.xml

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 2014 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


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