[ GLSA 200707-11 ] MIT Kerberos 5: Arbitrary remote code execution

[Raphael Marichez <falco () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200707-11
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                                            http://security.gentoo.org/
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  Severity: High
     Title: MIT Kerberos 5: Arbitrary remote code execution
      Date: July 25, 2007
      Bugs: #183338
        ID: 200707-11

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Synopsis
========

Multiple vulnerabilities in MIT Kerberos 5 could potentially result in
remote code execution with root privileges by unauthenticated users.

Background
==========

MIT Kerberos 5 is a suite of applications that implement the Kerberos
network protocol.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  app-crypt/mit-krb5     < 1.5.2-r3                     >= 1.5.2-r3

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

kadmind is affected by multiple vulnerabilities in the RPC library
shipped with MIT Kerberos 5. It fails to properly handle zero-length
RPC credentials (CVE-2007-2442) and the RPC library can write past the
end of the stack buffer (CVE-2007-2443). Furthermore kadmind fails to
do proper bounds checking (CVE-2007-2798).

Impact
======

A remote unauthenticated attacker could exploit these vulnerabilities
to execute arbitrary code with root 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-krb5-1.5.2-r3"

References
==========

  [ 1 ] CVE-2007-2442
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2442
  [ 2 ] CVE-2007-2443
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2443
  [ 3 ] CVE-2007-2798
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2798

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

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

  http://security.gentoo.org/glsa/glsa-200707-11.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 2007 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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