GLSA 200612-10 Tar: Directory traversal vulnerability
Posted on: 12/12/2006 12:05 AM

A new security update has been released for Gentoo Linux - Tar: Directory traversal vulnerability. Here the announcement:

Gentoo Linux Security Advisory GLSA 200612-10
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http://security.gentoo.org/
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Severity: Normal
Title: Tar: Directory traversal vulnerability
Date: December 11, 2006
Bugs: #155901
ID: 200612-10

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Synopsis
========

Tar is vulnerable to directory traversal possibly allowing for the
overwriting of arbitrary files.

Background
==========

The Tar program provides the ability to create and manipulate tar
archives.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-arch/tar lt; 1.16-r2 gt;= 1.16-r2

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

Tar does not properly extract archive elements using the GNUTYPE_NAMES
record name, allowing files to be created at arbitrary locations using
symlinks. Once a symlink is extracted, files after the symlink in the
archive will be extracted to the destination of the symlink.

Impact
======

An attacker could entice a user to extract a specially crafted tar
archive, possibly allowing for the overwriting of arbitrary files on
the system extracting the archive.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Tar users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-arch/tar-1.16-r2"

References
==========

[ 1 ] CVE-2006-6097
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6097

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

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

http://security.gentoo.org/glsa/glsa-200612-10.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
http://bugs.gentoo.org.

License
=======

Copyright 2006 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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