[Full-disclosure] [ GLSA 200504-28 ] Heimdal: Buffer overflow vulnerabilities

From: Sune Kloppenborg Jeppesen (jaervosz_at_gentoo.org)
Date: 04/28/05

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    To: gentoo-announce@gentoo.org
Date: Thu, 28 Apr 2005 17:08:48 +0200

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    Gentoo Linux Security Advisory GLSA 200504-28
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: Heimdal: Buffer overflow vulnerabilities
          Date: April 28, 2005
          Bugs: #89861
            ID: 200504-28

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    Synopsis
    ========

    Buffer overflow vulnerabilities have been found in the telnet client in
    Heimdal which could lead to execution of arbitrary code.

    Background
    ==========

    Heimdal is a free implementation of Kerberos 5 that includes a telnet
    client program.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-crypt/heimdal < 0.6.4 >= 0.6.4

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

    Buffer overflow vulnerabilities in the slc_add_reply() and
    env_opt_add() functions have been discovered by Gael Delalleau in the
    telnet client in Heimdal.

    Impact
    ======

    Successful exploitation would require a vulnerable user to connect to
    an attacker-controlled host using the telnet client, potentially
    executing arbitrary code with the permissions of the user running the
    application.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Heimdal users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-crypt/heimdal-0.6.4"

    References
    ==========

      [ 1 ] CAN-2005-0468
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468
      [ 2 ] CAN-2005-0469
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469

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

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

      http://security.gentoo.org/glsa/glsa-200504-28.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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