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Gentoo Linux Security Advisory                           GLSA 200409-19
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                                             http://security.gentoo.org/
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  Severity: High
     Title: Heimdal: ftpd root escalation
      Date: September 16, 2004
      Bugs: #61412
        ID: 200409-19

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Synopsis
========

Several bugs exist in the Heimdal ftp daemon which could allow a remote
attacker to gain root privileges.

Background
==========

Heimdal is an implementation of Kerberos 5.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  app-crypt/heimdal       < 0.6.3                          >= 0.6.3

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

Przemyslaw Frasunek discovered several flaws in lukemftpd, which also
apply to Heimdal ftpd's out-of-band signal handling code.

Additionally, a potential vulnerability that could lead to Denial of
Service by the Key Distribution Center (KDC) has been fixed in this
version.

Impact
======

A remote attacker could be able to run arbitrary code with escalated
privileges, which can result in a total compromise of the server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Heimdal users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=app-crypt/heimdal-0.6.3"
    # emerge ">=app-crypt/heimdal-0.6.3"

References
==========

  [ 1 ] Heimdal advisory
         http://www.pdc.kth.se/heimdal/advisory/2004-09-13/
  [ 2 ] Advisory by Przemyslaw Frasunek
         http://www.frasunek.com/lukemftpd.txt
  [ 3 ] CAN-2004-0794
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0794

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

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

   http://security.gentoo.org/glsa/glsa-200409-19.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 2004 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/1.0