full-disclosure - [ GLSA 200406-13 ] Squid: NTLM authentication helper buffer overflow

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Message-ID: <20040617120457.GS9639@mail.lieber.org>
From: klieber at gentoo.org (Kurt Lieber)
Subject: [ GLSA 200406-13 ] Squid: NTLM authentication helper buffer overflow

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Gentoo Linux Security Advisory                           GLSA 200406-13
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Squid: NTLM authentication helper buffer overflow
      Date: June 17, 2004
      Bugs: #53367
        ID: 200406-13

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Synopsis
========

Squid contains a bug where it fails to properly check bounds of the
'pass' variable.

Background
==========

Squid contains a bug in the function ntlm_check_auth(). It fails to do
proper bounds checking on the values copyied to the 'pass' variable.

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

    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
  1  net-www/squid      <= 2.5.5-r1                        >= 2.5.5-r2

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

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.

Impact
======

If Squid is configured to use NTLM authentication, an attacker could
exploit this vulnerability by sending a very long password. This could
lead to arbitrary code execution with the permissions of the user
running Squid.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.

Resolution
==========

All Squid users should upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=net-www/squid-2.5.5-r2"
    # emerge ">=net-www/squid-2.5.5-r2"

References
==========

  [ 1 ] CAN-2004-0541
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0541

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

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

     http://security.gentoo.org/glsa/glsa-200406-13.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Technologies, 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/1.0
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