[ GLSA 200411-16 ] zip: Path name buffer overflow

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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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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