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ESB-2016.0676 - [Win][Appliance] Citrix Products: Execute arbitrary code/commands - Remote/unauthenticated

Date: 14 March 2016
References: ESB-2016.0387  ESB-2016.0394  ESB-2016.0406  ESB-2016.0417.2  ESB-2016.0419.2  ESB-2016.0422  ESB-2016.0439.2  ESB-2016.0492  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0676
Security Bulletin: Vulnerability in GNU C Library(glibc) affects WebSphere
                  DataPower XC10 Appliance(CVE-2015-7547)
                               14 March 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Citrix License Server
                   Citrix XenMobile Server
                   Citrix XenMobile Device Manager
                   Citrix CloudBridge
                   Citrix NetScaler
                   Citrix NetScaler Gateway
                   Citrix Command Center
Publisher:         Citrix
Operating System:  Windows
                   Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-8277  

Reference:         ESB-2016.0492
                   ESB-2016.0439.2
                   ESB-2016.0422
                   ESB-2016.0419.2
                   ESB-2016.0417
                   ESB-2016.0406
                   ESB-2016.0394
                   ESB-2016.0387

Original Bulletin: 
   http://support.citrix.com/article/CTX207824

- --------------------------BEGIN INCLUDED TEXT--------------------

CTX207824

Citrix Licensing Security Updates to Address CVE-2015-8277

Security Bulletin | High | Created: 10 Mar 2016 | Modified: 10 Mar 2016

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 Server 10.3.x

    XenMobile Server 10.1.x

    XenMobile Server 10.0.x

    XenMobile Device Manager 9.0

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 the 
version of Citrix Licensing installed and upgrade the local License Server for
Windows to version 11.12.1.2. or later.

Customers using Citrix XenMobile Server 10.3.x, 10.1.x and 10.0.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 is 
currently in the process of creating patches for this issue and this bulletin
will be updated when further information is available.

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 we have more information 
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

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

March 10th 2016 Initial bulletin publishing

March 10th 2016 Add XenMobile products to Applicable Products section

March 10th 2016 Add ByteMobile products to Additional Affected Products 
section

Applicable Products

    Citrix Licensing 11.12

    Citrix Licensing 11.11

    Citrix Licensing 11.10

    Citrix Licensing 11.9

    Citrix Licensing 11.6

    Citrix Licensing 11.5

    XenMobile 10.0

    XenMobile 10.1

    XenMobile 10.3

    XenMobile 9.0

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
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Qld 4072

Internet Email: auscert@auscert.org.au
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===========================================================================
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