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             AUSCERT External Security Bulletin Redistribution

               Citrix XenClient XT Multiple Security Updates
                             13 September 2013


        AusCERT Security Bulletin Summary

Product:           XenServer
Publisher:         Citrix
Operating System:  Citrix XenServer
Impact/Access:     Root Compromise                 -- Existing Account
                   Execute Arbitrary Code/Commands -- Existing Account
                   Increased Privileges            -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-2601 CVE-2013-2196 CVE-2013-2195
                   CVE-2013-2194 CVE-2013-1432 CVE-2013-0231
                   CVE-2013-0217 CVE-2013-0216 

Reference:         ESB-2013.0931

Original Bulletin: 

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Citrix XenClient XT Multiple Security Updates

Document ID: CTX138633
Created On: Aug 28, 2013
Updated On: Aug 28, 2013

Severity: Medium

Description of Problem

A number of security vulnerabilities have been identified in Citrix XenClient 
XT. These vulnerabilities affect all currently supported versions of Citrix 
XenClient XT up to and including version 3.1.3.

The following vulnerabilities have been addressed:
- - CVE-2013-0216 & CVE-2013-0217: Linux netback DoS via malicious guest ring
- - CVE-2013-0231: Linux pciback DoS via not rate limited log messages
- - CVE-2013-1432: Page reference counting error
- - CVE-2013-2194, CVE-2013-2195 & CVE-2013-2196: Arbitrary code injection into 
the toolstack from PV guests
- - CVE-2013-2601: User can execute arbitrary commands within the NDVM by 
creating network connections in the UIVM
- - INTEL-SA-00035: SINIT Authenticated Code Module Privilege Escalation

What Customers Should Do

New versions of Citrix XenClient XT have been released to address these issues. 
Citrix recommends that customers using Citrix XenClient XT identify and deploy 
these new versions.

Citrix XenServer 3.1.3 and earlier:
XenClient XT version 3.1.4 may be downloaded from 

Citrix XenServer 2.1.2 and earlier:
XenClient XT version 2.1.3 may be downloaded from 

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/.

Obtaining Support on This Issue

If you require technical assistance with this issue, please contact Citrix 
Technical Support. Contact details for Citrix Technical Support are available 
at http://www.citrix.com/site/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 stating 
the exact version of the product in which the vulnerability was found and the 
steps needed to reproduce the vulnerability.

This document applies to:

XenClient XT 3

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