[Full-Disclosure] [ GLSA 200406-13 ] Squid: NTLM authentication helper buffer overflow

From: Kurt Lieber (klieber_at_gentoo.org)
Date: 06/17/04

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    To: gentoo-announce@gentoo.org
Date: Thu, 17 Jun 2004 12:04:57 +0000

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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@gentoo.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

    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

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