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[ GLSA 200505-05 ] gzip: Multiple vulnerabilities
From: Sune Kloppenborg Jeppesen <jaervosz () gentoo org>
Date: Mon, 9 May 2005 21:26:43 +0200

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Gentoo Linux Security Advisory                           GLSA 200505-05
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: gzip: Multiple vulnerabilities
      Date: May 09, 2005
      Bugs: #89946, #90626
        ID: 200505-05

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Synopsis
========

gzip contains multiple vulnerabilities potentially allowing an attacker
to execute arbitrary commands.

Background
==========

gzip (GNU zip) is a popular compression program. The included zgrep
utility allows you to grep gzipped files in place.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  app-arch/gzip     < 1.3.5-r6                          >= 1.3.5-r6

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

The gzip and gunzip programs are vulnerable to a race condition when
setting file permissions (CAN-2005-0988), as well as improper handling
of filename restoration (CAN-2005-1228). The zgrep utility improperly
sanitizes arguments, which may come from an untrusted source
(CAN-2005-0758).

Impact
======

These vulnerabilities could allow arbitrary command execution, changing
the permissions of arbitrary files, and installation of files to an
aribitrary location in the filesystem.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All gzip users should upgrade to the latest stable version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/gzip-1.3.5-r6"

References
==========

  [ 1 ] CAN-2005-0758
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0758
  [ 2 ] CAN-2005-0988
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0988
  [ 3 ] CAN-2005-1228
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1228

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

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

  http://security.gentoo.org/glsa/glsa-200505-05.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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