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Gentoo Linux Security Advisory 200505-5

Gentoo Linux Security Advisory 200505-5
Posted Jul 2, 2005
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200505-05 - The gzip and gunzip programs are vulnerable to a race condition when setting file permissions (CVE-2005-0988), as well as improper handling of filename restoration (CVE-2005-1228). The zgrep utility improperly sanitizes arguments, which may come from an untrusted source (CVE-2005-0758). Versions less than 1.3.5-r6 are affected.

tags | advisory
systems | linux, gentoo
advisories | CVE-2005-0758, CVE-2005-0988, CVE-2005-1228
SHA-256 | bd30667e24319d75118ffff528625889ca28f3ba03b3c3934b3f15254e632bbe

Gentoo Linux Security Advisory 200505-5

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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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