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Gentoo Linux Security Advisory                           GLSA 200506-16
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                                            https://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
          [ 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:

  https://security.gentoo.org/glsa/200506-16

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 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.

https://creativecommons.org/licenses/by-sa/2.0/