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Gentoo Linux Security Advisory                           GLSA 201202-05
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                                            http://security.gentoo.org/
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 Severity: High
    Title: Heimdal: Arbitrary code execution
     Date: February 22, 2012
     Bugs: #396105
       ID: 201202-05

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Synopsis
========

A boundary error in Heimdal could result in execution of arbitrary
code.

Background
==========

Heimdal is a free implementation of Kerberos 5.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-crypt/heimdal           < 1.5.1-r1               >= 1.5.1-r1

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

A boundary error in the "encrypt_keyid()" function in
appl/telnet/libtelnet/encrypt.c of the telnet daemon and client could
cause a buffer overflow.

Impact
======

An unauthenticated remote attacker may be able to execute arbitrary
code with the privileges of the user running the telnet daemon or
client, or cause Denial of Service.

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-1.5.1-r1"

References
==========

[ 1 ] CVE-2011-4862
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4862

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

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

 http://security.gentoo.org/glsa/glsa-201202-05.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
https://bugs.gentoo.org.

License
=======

Copyright 2012 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/2.5