CVE-2015-8277 - Citrix Licensing Security Updates

Description of Problem

A vulnerability has been identified in Citrix Licensing that could allow a remote, unauthenticated attacker to crash the License Server and potentially execute arbitrary code on the server.

This vulnerability affects the following products:

• Citrix License Server for Windows earlier than version 11.13.1.2
• Citrix License Server VPX earlier than version 11.13.1.2

In addition to the above, the vulnerable component is included in some other Citrix products. Please see the following section for more specific product guidance. This document will be updated as our investigation continues.

---

Additional Affected Products

Citrix CloudBridge

We are currently investigating the potential impact of this vulnerability on Citrix CloudBridge and this section will be updated as more information becomes available.

---

Citrix NetScaler

Citrix NetScaler and NetScaler Gateway:

Citrix NetScaler and NetScaler Gateway, both MPX and VPX, are not affected by this vulnerability. Citrix NetScaler SVM and Insight Center are currently in the process of being investigated and this section will be updated when more information is available.

Citrix Command Center:

Citrix Command Center is not affected by this vulnerability.

---

Citrix XenMobile

A vulnerable version of the Citrix License Server is installed as part of the initial configuration of the following versions of Citrix XenMobile:

• XenMobile Device Manager 9.0.x
• XenMobile Server 10.x through XenMobile Server 10.3.6.310.

Citrix XenMobile App Controller version 9.0.x is not affected by this vulnerability.

Customers using Citrix XenMobile Device Manager 9.0.x should verify the version of Citrix Licensing installed and upgrade the local License Server for Windows to version 11.13.1.2 or later.

Customers using Citrix XenMobile Server 10.x should note that, due to the way the server is configured, the potential impact of this vulnerability on the local License Server is greatly reduced. Citrix has provided patches as a defense-in-depth measure.

The vulnerability is addressed in these XenMobile Server 10.x patches:

• XenMobile Server 10.3.6 Rolling Patch 1 available at http://support.citrix.com/article/CTX215915.
• XenMobile Server 10.3 Rolling Patch 2 available at http://support.citrix.com/article/CTX209294.

---

Citrix ByteMobile

ByteMobile Unison Traffic Manager, ByteMobile Reporting Dashboard, ByteMobile Data Loader, and T2000 that use Flexera software are unaffected by this vulnerability. This section will be updated when further information is available.

---

---

Mitigating Factors

In order to exploit this issue, an attacker would need network access to the License Server. In most deployments, the License Server would not be exposed to the public Internet.

---

What Customers Should Do

Citrix has released a new version of the License Server for Windows and the License Server VPX that addresses this vulnerability. Citrix strongly recommends that customers upgrade to the following versions:

• Citrix License Server for Windows version 11.13.1.2 or later
• Citrix License Server VPX version 11.13.1.2 or later

These new versions can be downloaded from the following location:

• <https://www.citrix.com/downloads/licensing.html&gt;

---

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;_.

---

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;_.

---

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
March 10th 2016	Initial bulletin publishing
March 10th 2016	Added XenMobile products to Applicable Products section
March 10th 2016	Added ByteMobile products to Additional Affected Products section
March 14th 2016	Update to XenMobile section
August 31st 2016	Added patches to XenMobile section

---