- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200504-28
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            https://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:

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

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 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.

https://creativecommons.org/licenses/by-sa/2.0/