[ GLSA 200504-28 ] Heimdal: Buffer overflow vulnerabilities

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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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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