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             AUSCERT External Security Bulletin Redistribution

                       Citrix SD-WAN Security Update
                                1 May 2019


        AusCERT Security Bulletin Summary

Product:           Citrix SD-WAN
Publisher:         Citrix
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11550  

Original Bulletin: 

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Citrix SD-WAN Security Update

Reference: CTX247735

Category : High

Created  : 30 Apr 2019

Modified : 30 Apr 2019

Applicable Products

  o Citrix SD-WAN

Description of Problem

An information disclosure vulnerability has been identified in the Citrix
SD-WAN Appliance. This vulnerability could allow an unauthenticated attacker to
perform a man-in-the-middle attack against management traffic. The
vulnerability has been assigned the following CVE number.

CVE-2019-11550 - Information Disclosure in Citrix SD-WAN Appliance 10.2.x
before 10.2.2 and NetScaler SD-WAN Appliance 10.0.x before 10.0.7.

Affected Versions:

o All versions of NetScaler SD-WAN 9.x *

o All versions of NetScaler SD-WAN 10.0.x earlier than 10.0.7

o All versions of Citrix SD-WAN 10.1.x *

o All versions of Citrix SD-WAN 10.2.x earlier than 10.2.2

* Upgrade to 10.0.7 or 10.2.2 for security update

Mitigating Factors

In order to protect against these vulnerabilities and web application related
issues, Citrix recommends access to the management console be restricted. In
situations where customers have deployed their management console in line with
industry best practice, network access to this interface should already be

Security Best Practices:

10.x - 

What Customers Should Do

These vulnerabilities have been addressed in the following software versions:

o NetScaler SD-WAN 10.0.7

o Citrix SD-WAN 10.2.2

Citrix strongly recommends that customers using vulnerable software upgrade
their management console to the new version or later as soon as possible.

If using a version of SD-WAN that is no longer supported, upgrade to the new
version of the product that includes the security update.

The new software versions will be available on the Citrix website. Information
on the available versions can be found at the following location:


In line with general best practice, Citrix also recommends that customers limit
access to the management console of the Citrix SD-WAN Appliance / NetScaler
SD-WAN Appliance to trusted network traffic only.


Citrix thanks Sergey Gordeychik, Denis Kolegov, and Nikita Oleksov of SD-WAN
New Hop(e) team for working with us to protect Citrix customers.


|Date                               |Change                                   |
|30th April 2019                    |Initial publishing                       |

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