GLSA 200505-05: gzip: Multiple vulnerabilities
Posted on: 05/09/2005 04:43 PM

A gzip security update has been released for Gentoo Linux

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

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Package / Vulnerable / Unaffected
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1 app-arch/gzip lt; 1.3.5-r6 gt;= 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 "gt;=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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