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                                  CERT-Renater

                       Note d'Information No. 2004/VULN488
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DATE                      : 16/11/2004

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Linux systems running zip.

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Gentoo Linux Security Advisory                           GLSA 200411-16
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                                             http://security.gentoo.org/
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   Severity: Normal
      Title: zip: Path name buffer overflow
       Date: November 09, 2004
       Bugs: #70227
         ID: 200411-16

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Synopsis
========

zip contains a buffer overflow when creating a ZIP archive of files
with very long path names. This could lead to the execution of
arbitrary code.

Background
==========

zip is a compression and file packaging utility.

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

     -------------------------------------------------------------------
      Package       /  Vulnerable  /                         Unaffected
     -------------------------------------------------------------------
   1  app-arch/zip      <= 2.3-r3                             >= 2.3-r4

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

zip does not check the resulting path length when doing recursive
folder compression.

Impact
======

An attacker could exploit this by enticing another user or web
application to create an archive including a specially-crafted path
name, potentially resulting in the execution of arbitrary code with the
permissions of the user running zip.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All zip users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=app-arch/zip-2.3-r4"

References
==========

   [ 1 ] HexView zip Advisory
         http://www.hexview.com/docs/20041103-1.txt

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

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

   http://security.gentoo.org/glsa/glsa-200411-16.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 2004 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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