bugtraq - [ GLSA 201111-11 ] GNU Tar: User-assisted execution of arbitrary code

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Date: Sun, 20 Nov 2011 19:14:46 +0100
From: Alex Legler <a3li@...too.org>
To: gentoo-announce@...ts.gentoo.org
Cc: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk,
  security-alerts@...uxsecurity.com
Subject: [ GLSA 201111-11 ] GNU Tar: User-assisted execution of arbitrary code

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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@...too.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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