GLSA 200506-16: cpio: Directory traversal vulnerability
Posted on: 06/20/2005 04:44 AM

A cpio security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200506-16
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http://security.gentoo.org/
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Severity: Normal
Title: cpio: Directory traversal vulnerability
Date: June 20, 2005
Bugs: #90619
ID: 200506-16

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Synopsis
=======

cpio contains a flaw which may allow a specially crafted cpio archive to extract files to an arbitrary directory.

Background
=========

cpio is a file archival tool which can also read and write tar files.

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

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Package / Vulnerable / Unaffected
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1 app-arch/cpio lt; 2.6-r3 gt;= 2.6-r3

Description
==========

A vulnerability has been found in cpio that can potentially allow a cpio archive to extract its files to an arbitrary directory of the creator's choice.

Impact
=====

An attacker could create a malicious cpio archive which would create files in arbitrary locations on the victim's system. This issue could also be used in conjunction with a previous race condition vulnerability (CAN-2005-1111) to change permissions on files owned by the victim.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All cpio users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-arch/cpio-2.6-r3"

References
=========

[ 1 ] Original Advisory
http://www.securityfocus.com/archive/1/396429
[ 2 ] CAN-2005-1111
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1111

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

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

http://security.gentoo.org/glsa/glsa-200506-16.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 2005 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/2.0


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