=====================================================================
                                   CERT-Renater

                        Note d'Information No. 2010/VULN051
_____________________________________________________________________

DATE                      : 28/01/2010

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running XenServer versions 5.0, 5.5.

======================================================================
http://support.citrix.com/article/CTX123453
______________________________________________________________________

Vulnerability in XenServer 5.0 and 5.5 Could Result in Arbitrary Code Execution
Document ID: CTX123453   /   Created On: Jan 25, 2010   /   Updated On: Jan 25, 2010

View products this document applies to link to products this document applies to

Severity: High

Description of Problem

The RealTek 8169 Linux network adaptor driver used in XenServer fails to
correctly handle long packets. This could result in denial of service
(hard crash of the host) or remote execution of code.

This vulnerability has been assigned the following CVE number:

      • CVE-2009-1389

This vulnerability affects the following products:

      • XenServer 5.0 Update 3, and earlier

      • XenServer 5.5


Mitigating Factors

The vulnerability is specific to the Realtek 8169 driver. No other
drivers are affected.


What Customers Should Do

A hotfix has been released to address this issue. Citrix recommends that
affected customers install this hotfix, which can be downloaded from the
following locations:

Citrix XenServer 5.0:

http://support.citrix.com/article/CTX123192

Citrix XenServer 5.5:

http://support.citrix.com/article/CTX123673


What Citrix Is Doing

Citrix is notifying customers and channel partners about this potential
security issue. This article is also available from the Citrix
Knowledge Center at http://support.citrix.com/article/CTX123453.


Obtaining Support on this Issue

If you require technical assistance with this issue, contact Citrix
Technical Support. Information for contacting Citrix Technical Support
is available at http://www.citrix.com/English/ss/supportContacts.asp.


Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and
considers any and all potential vulnerabilities seriously. If you
would like to report a security issue to Citrix, please compose an
e-mail to secure@citrix.com containing the exact version of the
product in which the vulnerability was found and the steps needed
to reproduce the vulnerability.

This document applies to:

    * XenServer 5.0 Update 3
    * XenServer 5.5



======================================================================

          =========================================================
          Les serveurs de référence du CERT-Renater
          http://www.urec.fr/securite
          http://www.cru.fr/securite
          http://www.renater.fr
          =========================================================
          + CERT-RENATER          | tel : 01-53-94-20-44          +
          + 151 bd de l'Hopital   | fax : 01-53-94-20-41          +
          + 75013 Paris           | email: certsvp@renater.fr     +
          =========================================================