January 2005

ID: 00045
Ref: 41/2005
Date: 19 January 2005:15:31:02
Version: 1

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Title: Gentoo Linux Security Advisory - GLSA 200501-25 - squid
Abstract:
Vendors affected: Gentoo
Operating systems affected: Gentoo
Applications affected: Gentoo

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Title
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Gentoo Linux Security Advisory - GLSA 200501-25 - squid

Detail
======

Squid contains a vulnerability in the gopherToHTML function and incorrectly
checks the 'number of caches' field when parsing WCCP_I_SEE_YOU messages.
Furthermore the NTLM code contains two errors. One is a memory leak in the
fakeauth_auth helper and the other is NULL pointer dereferencing error.




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Gentoo Linux Security Advisory
http://security.gentoo.org/
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Severity: Normal
Title: Squid: Multiple vulnerabilities
Date: January 16, 2005
Bugs: #77934, #77521
ID: 200501-25

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Synopsis
========

Squid contains vulnerabilities in the the code handling NTLM (NT Lan Manager),
Gopher to HTML and WCCP (Web Cache Communication Protocol) which could lead
to denial of service and arbitrary code execution.

Background
==========

Squid is a full-featured Web proxy cache designed to run on Unix systems.
It supports proxying and caching of HTTP, FTP, and other URLs, as well as
SSL support, cache hierarchies, transparent caching, access control lists
and many other features.

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

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Package / Vulnerable / Unaffected
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1 www-proxy/squid < 2.5.7-r2 >= 2.5.7-r2

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

Squid contains a vulnerability in the gopherToHTML function and incorrectly
checks the 'number of caches' field when parsing WCCP_I_SEE_YOU messages.
Furthermore the NTLM code contains two errors. One is a memory leak in the
fakeauth_auth helper and the other is NULL pointer dereferencing error.

Impact
======

With the WCCP issue an attacker could cause denial of service by sending a
specially crafted UDP packet. With the Gopher issue an attacker might be able
to execute arbitrary code by enticing a user to connect to a malicious Gopher
server. The NTLM issues could lead to denial of service by memory consumption
or by crashing Squid.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Squid users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-proxy/squid-2.5.7-r2"

References
==========

[ 1 ] Secunia Advisory SA13825
http://secunia.com/advisories/13825/
[ 2 ] Secunia Advisory SA13789
http://secunia.com/advisories/13789/

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

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

http://security.gentoo.org/glsa/glsa-200501-25.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