CVE-2019-11550 - Citrix SD-WAN Security Update

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:

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

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

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

• 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 restricted.

Security Best Practices:

10.x - <https://docs.citrix.com/en-us/netscaler-sd-wan/10/best-practices/security-best-practices.html&gt;

What Customers Should Do

These vulnerabilities have been addressed in the following software versions:

• NetScaler SD-WAN 10.0.7

• 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:

<https://www.citrix.com/downloads/netscaler-sd-wan/&gt;

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.

Acknowledgements

Citrix thanks Sergey Gordeychik, Denis Kolegov, and Nikita Oleksov of SD-WAN New Hop(e) team 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 _ <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
30th April 2019	Initial publishing