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AUSCERT External Security Bulletin Redistribution
ESB-2014.1917
Citrix XenServer Shellshock Security Update
23 October 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Citrix XenServer
Publisher: Citrix
Operating System: Citrix XenServer
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-7187 CVE-2014-7186 CVE-2014-7169
CVE-2014-6278 CVE-2014-6277 CVE-2014-6271
Reference: ASB-2014.0114
ESB-2014.1899
ESB-2014.1799
ESB-2014.1764
ESB-2014.1657
Original Bulletin:
http://support.citrix.com/article/CTX200223
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Citrix XenServer Shellshock Security Update
CTX200223
Created on Sep 30, 2014
Updated on Oct 10, 2014
Severity: Medium
Description of Problem
A number of security vulnerabilities have been identified in the 'bash'
component of Citrix XenServer. These issues include those known as
'Shellshock' and have the following identifiers: CVE-2014-6271,
CVE-2014-6277, CVE-2014-6278, CVE-2014-7169, CVE-2014-7186 and CVE-2014-7187.
These issues affect all supported versions of Citrix XenServer up to and
including Citrix XenServer 6.2 Service Pack 1.
In deployments where the Citrix XenServer host is configured to use DHCP for
the host IP address allocation, this issue could allow an attacker with
access to the management network to compromise the Citrix XenServer host.
Mitigating Factors
Customers that do not use DHCP to assign IP addresses to their Citrix
XenServer hosts are not at risk.
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 6.2 Service Pack 1: CTX141486 - Hotfix XS62ESP1014 - For
XenServer 6.2.0 Service Pack 1
* Citrix XenServer 6.1: CTX141487- Hotfix XS61E044 - For XenServer 6.1.0
* Citrix XenServer 6.0.2: CTX141489 - Hotfix XS602E037 - For XenServer 6.0.2
* Customers using Citrix XenServer 6.0.2 in the Common Criteria evaluated
configuration should apply the following hotfix: CTX141488 - Hotfix
XS602ECC013 - For XenServer 6.0.2 Common Criteria
* Citrix XenServer 6.0: CTX141490 - Hotfix XS60E041 - For XenServer 6.0
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
Applicable Products
* XenServer 6.2.0
* XenServer 6.1.0
* XenServer 6.0.2
* XenServer 6.0
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