[ GLSA 200507-16 ] dhcpcd: Denial of Service vulnerability

From: Thierry Carrez (koon_at_gentoo.org)
Date: 07/15/05

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    Date: Fri, 15 Jul 2005 22:23:01 +0200
    To: gentoo-announce@lists.gentoo.org
    
    
    

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    Gentoo Linux Security Advisory GLSA 200507-16
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: dhcpcd: Denial of Service vulnerability
          Date: July 15, 2005
          Bugs: #98394
            ID: 200507-16

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    Synopsis
    ========

    A vulnerability in dhcpcd may cause the dhcpcd daemon to crash.

    Background
    ==========

    dhcpcd is a standards compliant DHCP client daemon. It requests an IP
    address and other information from the DHCP server, automatically
    configures the network interface, and tries to renew the lease time.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-misc/dhcpcd < 1.3.22_p4-r11 >= 1.3.22_p4-r11

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

    infamous42md discovered that dhcpcd can be tricked to read past the end
    of the supplied DHCP buffer. As a result, this might lead to a crash of
    the daemon.

    Impact
    ======

    With a malicious DHCP server an attacker could cause a Denial of
    Service by crashing the DHCP client.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All dhcpcd users should upgrade to the latest available version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=net-misc/dhcpcd-1.3.22_p4-r11"

    References
    ==========

      [ 1 ] CAN-2005-1848
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1848

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

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

      http://security.gentoo.org/glsa/glsa-200507-16.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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