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AUSCERT External Security Bulletin Redistribution
ESB-2014.1187
Citrix XenServer Multiple Security Updates
18 July 2014
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AusCERT Security Bulletin Summary
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Product: Citrix XenServer
Publisher: Citrix
Operating System: Citrix XenServer
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2014-4948 CVE-2014-4947 CVE-2014-4021
Reference: ESB-2014.1002.2
Original Bulletin:
http://support.citrix.com/article/CTX140984
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Citrix XenServer Multiple Security Updates
CTX140984
Created On Jul 15, 2014
Updated On Jul 15, 2014
Severity: High
Description of Problem
A number of security vulnerabilities have been identified in Citrix XenServer.
These vulnerabilities affect all currently supported versions of Citrix
XenServer up to and including Citrix XenServer 6.2 Service Pack 1.
The following vulnerabilities have been addressed:
CVE-2014-4021: Citrix XenServer potential guest information leak through
hypervisor page reuse
CVE-2014-4947: Buffer overflow in Citrix XenServer HVM graphics console
support
CVE-2014-4948: Citrix XenServer guest denial of service and information leak
through guest VHD modification
What Customers Should Do
Hotfixes have been released to address these issues. Citrix strongly
recommends that affected customers install the relevant hotfixes, which can be
downloaded from the following locations:
Citrix XenServer 6.2 Service Pack 1: CTX141036 Hotfix XS62ESP1008 - For
XenServer 6.2.0 Service Pack 1
Citrix XenServer 6.1: CTX141038 Hotfix XS61E041 - For XenServer 6.1.0 and
CTX141044 Hotfix XS61E040 - For XenServer 6.1.0
Citrix XenServer 6.0.2: CTX141040 Hotfix XS602E035 - For XenServer 6.0.2
Customers using Citrix XenServer 6.0.2 in the Common Criteria evaluated
configuration should apply the following hotfixes: CTX141039 Hotfix
XS602ECC011 - For XenServer 6.0.2 Common Criteria and CTX141043 Hotfix
XS602ECC010 - For XenServer 6.0.2 Common Criteria
Citrix XenServer 6.0.0: CTX141041 Hotfix XS60E039 - For XenServer 6.0 and
CTX141042 Hotfix XS60E038 - For XenServer 6.0
These hotfixes also provide updates to the OpenSSL package in Dom0. These
updates are not in response to any specific vulnerability but may reduce false
positive results from certain vulnerability scanners.
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. For guidance on how to report
security-related issues to Citrix, please see the following document:
CTX081743 Reporting Security Issues to Citrix
Applicable Products
XenServer 6.0
XenServer 6.0.2
XenServer 6.0.2 Common Criteria
XenServer 6.1.0
XenServer 6.2.0
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