CVE-2016-9603 - Citrix XenServer Security Update

Description of Problem

A security issue has been identified within Citrix XenServer. This issue could, if exploited, allow the administrator of an HVM guest VM to compromise the host.

The following vulnerability has been addressed:

• CVE-2016-9603 (High): QEMU: Cirrus VGA Heap overflow via display refresh

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Mitigating Factors

Customers using only PV guest VMs are not affected by this vulnerability.

Customers using only VMs that use the std-vga graphics emulation are not affected by this vulnerability.

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What Customers Should Do

Hotfixes have been released to address these issues. Citrix recommends that affected customers install these hotfixes, which can be downloaded from the following locations:

Citrix XenServer 7.1: CTX221590 – <https://support.citrix.com/article/CTX221590&gt;

Citrix XenServer 7.0: CTX221571 – <https://support.citrix.com/article/CTX221571&gt;

Citrix XenServer 6.5 SP1: CTX221716 – <https://support.citrix.com/article/CTX221716&gt;

Citrix XenServer 6.2 SP1: CTX221569 – <https://support.citrix.com/article/CTX221569&gt;

Citrix XenServer 6.0.2 Common Criteria: CTX221568– <https://support.citrix.com/article/CTX221568&gt;

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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/&gt;_.

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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 _ <https://www.citrix.com/support/open-a-support-case.html&gt;_.

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Reporting Security Vulnerabilities

Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. For guidance on how to report security-related issues to Citrix, please see the following document: CTX081743 – Reporting Security Issues to Citrix

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Changelog

Date	Change
14th March 2017	Initial publishing

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