[ GLSA 200501-25 ] Squid: Multiple vulnerabilities

From: Sune Kloppenborg Jeppesen (jaervosz_at_gentoo.org)
Date: 01/16/05

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    To: gentoo-announce@gentoo.org
Date: Sun, 16 Jan 2005 20:47:41 +0100

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    Gentoo Linux Security Advisory GLSA 200501-25
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                                                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
    =================

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      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

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