CVE-2007-5497 – Vulnerability in XenServer could result in privilege escalation and arbitrary code execution

Description of Problem

A vulnerabilitly has been identified in Citrix XenServer that could result in attackers escaping a guest domain and potentially executing arbitrary code in in the control domain.

This vulnerability has been assigned the following CVE number:

    • CVE-2007-5497

This vulnerability is present in all versions of XenServer up to and including 4.1.0.

Mitigating Factors

In order to exploit this vulnerability the user needs write access to an Ext2/Ext3 partition which is used by XenServer to boot a guest domain running Linux.

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:

XenServer 4.1.0:

XenServer 4.0.1:

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

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

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 stating the exact version of the product in which the vulnerability was found and the steps needed to reproduce the vulnerability.


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