A Heimdal update has been released for Gentoo Linux

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200504-28
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: Heimdal: Buffer overflow vulnerabilities
Date: April 28, 2005
Bugs: #89861
ID: 200504-28

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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