[ GLSA 200506-16 ] cpio: Directory traversal vulnerability

[Luke Macken <lewk () gentoo org>]

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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
=================

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  app-arch/cpio      < 2.6-r3                             >= 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 ">=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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