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Gentoo Linux Security Advisory                           GLSA 200608-15
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  Severity: High
     Title: MIT Kerberos 5: Multiple local privilege escalation
            vulnerabilities
      Date: August 10, 2006
      Bugs: #143240
        ID: 200608-15

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Synopsis
========

Some applications shipped with MIT Kerberos 5 are vulnerable to local
privilege escalation.

Background
==========

MIT Kerberos 5 is a suite of applications that implement the Kerberos
network protocol. It is designed to provide strong authentication for
client/server applications by using secret-key cryptography.

Affected packages
=================

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  app-crypt/mit-krb5     < 1.4.3-r3                     >= 1.4.3-r3

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

Unchecked calls to setuid() in krshd and v4rcp, as well as unchecked
calls to seteuid() in kftpd and in ksu, have been found in the MIT
Kerberos 5 program suite and may lead to a local root privilege
escalation.

Impact
======

A local attacker could exploit this vulnerability to execute arbitrary
code with elevated privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MIT Kerberos 5 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.4.3-r3"

References
==========

  [ 1 ] CVE-2006-3083
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3083
  [ 2 ] CVE-2006-3084
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3084

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

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

  http://security.gentoo.org/glsa/glsa-200608-15.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 2006 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

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