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[ GLSA 201111-11 ] GNU Tar: User-assisted execution of arbitrary code
From: Alex Legler <a3li () gentoo org>
Date: Sun, 20 Nov 2011 19:14:46 +0100

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Gentoo Linux Security Advisory                           GLSA 201111-11
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: GNU Tar: User-assisted execution of arbitrary code
     Date: November 20, 2011
     Bugs: #313333
       ID: 201111-11

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Synopsis
========

A buffer overflow flaw in GNU Tar could result in execution of
arbitrary code or a Denial of Service.

Background
==========

GNU Tar is a utility to create archives as well as add and extract
files from archives.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-arch/tar                  < 1.23                     >= 1.23 

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

GNU Tar is vulnerable to a boundary error in the rmt_read__ function in
lib/rtapelib.c, which could cause a heap-based buffer overflow.

Impact
======

A remote attacker could entice the user to load a specially crafted
archive, possibly resulting in the execution of arbitrary code or a
Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GNU Tar users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-arch/tar-1.23"

NOTE: This is a legacy GLSA. Updates for all affected architectures are
available since July 18, 2010. It is likely that your system is already
no longer affected by this issue.

References
==========

[ 1 ] CVE-2010-0624
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-0624

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

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

 http://security.gentoo.org/glsa/glsa-201111-11.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 2011 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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