[ GLSA 200504-28 ] Heimdal: Buffer overflow vulnerabilities

[Sune Kloppenborg Jeppesen]

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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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