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ESB-2016.0421 - [Appliance] Citrix NetScaler: Multiple vulnerabilities

Date: 19 February 2016

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             AUSCERT External Security Bulletin Redistribution

           Citrix NetScaler Application Delivery Controller and
                NetScaler Gateway Multiple Security Updates
                             19 February 2016


        AusCERT Security Bulletin Summary

Product:           Citrix NetScaler
Publisher:         Citrix
Operating System:  Network Appliance
Impact/Access:     Increased Privileges            -- Existing Account
                   Execute Arbitrary Code/Commands -- Existing Account
                   Provide Misleading Information  -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-2072 CVE-2016-2071 

Original Bulletin:

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

Citrix NetScaler Application Delivery Controller and NetScaler Gateway 
Multiple Security Updates

Security Bulletin | Medium | Created: 10 Feb 2016 | Modified: 11 Feb 2016

Description of Problem

A number of vulnerabilities have been identified in Citrix NetScaler 
Application Delivery Controller (ADC) and NetScaler Gateway that could allow a
malicious, unprivileged user to perform privileged operations or execute 

The following vulnerabilities have been addressed:

CVE-2016-2071: Citrix NetScaler Application Delivery Controller and NetScaler
Gateway Command Privilege Elevation Vulnerability Through Un-sanitised NS Web
GUI Commands.

CVE-2016-2072: Vulnerability in Citrix NetScaler Application Delivery 
Controller and NetScaler Gateway Administrative Web Interface Could Result in

These vulnerabilities affect the following versions of Citrix NetScaler ADC 
and NetScaler Gateway:

    Version 11.0 earlier than 11.0 Build 64.34.

    Version 10.5 earlier than 10.5 Build 59.13 and 10.5.e earlier than 10.5.e
Build 59.1305.e

    All builds of version 10.1 are affected by CVE-2016-2072 only. 
CVE-2016-2071 does not affect version 10.1

What Customers Should Do

These vulnerabilities have been addressed in the following versions of Citrix
NetScaler ADC and NetScaler Gateway:

    Citrix NetScaler ADC and NetScaler Gateway version 11.0 Build 64.34 and 

    Citrix NetScaler ADC and NetScaler Gateway version 10.5 Build 59.13 and 
later and version 10.5.e Build 59.1305.e and later

Customers using Citrix NetScaler ADC and NetScaler Gateway 10.1 with specific
concerns around CVE-2015-2072 (Clickjacking), and that are not able to upgrade
to these new versions, can upgrade to version 10.1 Build 133.9 and later which
contain additional protections for this issue.

These new versions can be downloaded from the following locations:

Citrix recommends that customers using affected versions of the NetScaler ADC
and NetScaler Gateway upgrade to a version of the appliance firmware that 
contains the fixes for these issues as soon as their normal patching schedule


Citrix thanks Chathura Abeydeera of Deloitte Touche Tohmatsu Australia for 
working with us to protect Citrix customers.

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

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

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


Date Change

February 10th 2016 Initial publishing

February 11th 2016 Update to Description of Problem section

Applicable Products

    NetScaler 10.1 NetScaler 10.5 NetScaler 11.0 NetScaler Gateway 10.1 
NetScaler Gateway 10.5 NetScaler Gateway 11.0

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

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Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

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