[Full-Disclosure] [ GLSA 200411-01 ] ppp: Remote denial of service vulnerability

From: Luke Macken (lewk_at_gentoo.org)
Date: 11/01/04

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    To: gentoo-announce@gentoo.org
    Date: Mon, 01 Nov 2004 12:21:51 -0500
    
    
    

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    Gentoo Linux Security Advisory GLSA 200411-01
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: ppp: Remote denial of service vulnerability
          Date: November 01, 2004
          Bugs: #69152
            ID: 200411-01

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    Synopsis
    ========

    pppd contains a vulnerability that may allow an attacker to crash the
    server.

    Background
    ==========

    ppp is a Unix implementation of the Point-to-Point Protocol.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-dialup/ppp < 2.4.2-r7 >= 2.4.2-r7

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

    The pppd server improperly verifies header fields, making it vulnerable
    to denial of service attacks.

    Impact
    ======

    An attacker can cause the pppd server to access memory that it isn't
    allowed to, causing the server to crash. No code execution is possible
    with this vulnerability, because no data is getting copied.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All ppp users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=net-dialup/ppp-2.4.2-r7"

    References
    ==========

      [ 1 ] BugTraq Advisory
            http://www.securityfocus.com/archive/1/379450

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

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

      http://security.gentoo.org/glsa/glsa-200411-01.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 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/1.0

    
    

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