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AUSCERT External Security Bulletin Redistribution
ESB-2015.1034
Citrix XenServer Multiple Security Updates
16 April 2015
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AusCERT Security Bulletin Summary
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Product: Citrix XenServer
Publisher: Citrix
Operating System: Citrix XenServer
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2014-8106 CVE-2014-7815 CVE-2014-3615
Reference: ESB-2015.0926
ESB-2015.0508
ESB-2015.0504
ESB-2015.0137
ESB-2014.2295
ESB-2014.2294
ESB-2014.2274
ESB-2014.2154
ESB-2014.2083.2
ESB-2014.2062
ESB-2014.1886
ESB-2014.1772
Original Bulletin:
http://support.citrix.com/article/CTX200892
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Citrix XenServer Multiple Security Updates
CTX200892 Created on Apr 09, 2015
Updated on Apr 14, 2015
Security Bulletin Severity : High
Description of Problem
A number of security vulnerabilities have been identified in Citrix XenServer.
These vulnerabilities could, if exploited, allow a malicious administrator of
an HVM guest to compromise the host.
These vulnerabilities affect all currently supported versions of Citrix
XenServer up to and including Citrix XenServer 6.5.
The following vulnerabilities have been addressed:
CVE-2014-8106 (High): Heap-based buffer overflow in the Cirrus VGA emulator
CVE-2014-7815 (Low): The set_pixel_format function in QEMU allows a denial of
service (crash)
CVE-2014-3615 (Low): The VGA emulator in QEMU allows users to read memory
Mitigating Factors
Customers who are running PV guests only are not at risk from these issues.
Customers that are only using HVM guests created from the Citrix standard
Windows 8 templates are not vulnerable to CVE-2014-8106.
Customers using Citrix XenServer 6.5 are not vulnerable to CVE-2014-8106.
What Customers Should Do
Hotfixes have been released to address these issues. Citrix recommends that
affected customers install the relevant hotfixes, which can be downloaded from
the following locations:
Citrix XenServer 6.5: CTX142273 https://support.citrix.com/article/CTX142273
Citrix XenServer 6.2 Service Pack 1: CTX142272
https://support.citrix.com/article/CTX142272
Citrix XenServer 6.1: CTX142271 https://support.citrix.com/article/CTX142271
Citrix XenServer 6.0.2: CTX142269 https://support.citrix.com/article/CTX142269
Customers using Citrix XenServer 6.0.2 in the Common Criteria evaluated
configuration should apply the following hotfixes: CTX142270
https://support.citrix.com/article/CTX142270
Citrix XenServer 6.0.0: CTX142268 https://support.citrix.com/article/CTX142268
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
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
Changelog
Date Change
April 14th 2015 Initial bulletin publishing
Applicable Products
XenServer 6.5
XenServer 6.2.0
XenServer 6.1.0
XenServer 6.0.2
XenServer 6.0
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