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[ GLSA 200608-15 ] MIT Kerberos 5: Multiple local privilege escalation
From: Raphael Marichez <falco () gentoo org>
Date: Thu, 10 Aug 2006 16:51:08 +0200

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Gentoo Linux Security Advisory                           GLSA 200608-15
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                                            http://security.gentoo.org/
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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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