The OpenNET Project
 
Search (keywords):  SOFT ARTICLES TIPS & TRICKS SECURITY
LINKS NEWS MAN DOCUMENTATION


[ GLSA 200406-21 ] mit-krb5: Multiple buffer overflows in krb5_aname_to_localname


<< Previous INDEX Search src Set bookmark Go to bookmark Next >>
Date: Tue, 29 Jun 2004 16:23:42 +0000
From: Kurt Lieber <[email protected]>
To: [email protected]
Subject: [ GLSA 200406-21 ] mit-krb5: Multiple buffer overflows in krb5_aname_to_localname
Cc: [email protected], [email protected],
 [email protected]


--FhvelBhrd33NvMcY
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200406-21
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: High
     Title: mit-krb5: Multiple buffer overflows in
            krb5_aname_to_localname
      Date: June 29, 2004
      Bugs: #52744
        ID: 200406-21

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

mit-krb5 contains multiple buffer overflows in the function
krb5_aname_to_localname(). This could potentially lead to a complete
remote system compromise.

Background
==========

mit-krb5 is the free implementation of the Kerberos network
authentication protocol by the Massachusetts Institute of Technology.

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

    -------------------------------------------------------------------
     Package             /   Vulnerable   /                 Unaffected
    -------------------------------------------------------------------
  1  app-crypt/mit-krb5       <= 1.3.3                     >= 1.3.3-r1

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

The library function krb5_aname_to_localname() contains multiple buffer
overflows. This is only exploitable if explicit mapping or rules-based
mapping is enabled. These are not enabled as default.

With explicit mapping enabled, an attacker must authenticate using a
principal name listed in the explicit mapping list.

With rules-based mapping enabled, an attacker must first be able to
create arbitrary principal names either in the local realm Kerberos
realm or in a remote realm from which the local realm's service are
reachable by cross-realm authentication.

Impact
======

An attacker could use these vulnerabilities to execute arbitrary code
with the permissions of the user running mit-krb5, which could be the
root user.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.

Resolution
==========

mit-krb5 users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=app-crypt/mit-krb5-1.3.3-r1"
    # emerge ">=app-crypt/mit-krb5-1.3.3-r1"

References
==========

  [ 1 ] CAN-2004-0523
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0523
  [ 2 ] MIT krb5 Security Advisory
        http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2004-001-an_to_ln.txt

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

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

     http://security.gentoo.org/glsa/glsa-200406-21.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
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Technologies, 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

--FhvelBhrd33NvMcY
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFA4ZeOJPpRNiftIEYRAnyPAJ9VCgwoZZhZKphiK6nSUVeRLa84mwCgkO63
LKhUnxjxdCVTIzpHKzjD3yE=
=nvPx
-----END PGP SIGNATURE-----

--FhvelBhrd33NvMcY--

<< Previous INDEX Search src Set bookmark Go to bookmark Next >>



Партнёры:
PostgresPro
Inferno Solutions
Hosting by Hoster.ru
Хостинг:

Закладки на сайте
Проследить за страницей
Created 1996-2024 by Maxim Chirkov
Добавить, Поддержать, Вебмастеру