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             AUSCERT External Security Bulletin Redistribution

               CVE-2020-6175 - Citrix SD-WAN Security Update
                              13 January 2020


        AusCERT Security Bulletin Summary

Product:           Citrix SD-WAN Appliance
Publisher:         Citrix
Operating System:  Network Appliance
Impact/Access:     Provide Misleading Information -- Remote/Unauthenticated
                   Access Confidential Data       -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-6175  

Reference:         ESB-2020.0103

Original Bulletin: 

Revision History:  January 10 2020: Updated URL
                   January 09 2020: Initial Release

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

CVE-2020-6175 - Citrix SD-WAN Security Update

Reference: CTX263526

Category : High

Created  : 09 Jan 2020
Modified : 10 Jan 2020

Applicable Products

  o Citrix SD-WAN
  o Citrix SD-WAN 10.1
  o NetScaler SD-WAN 10.0

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-2020-6175- Information Disclosure in Citrix SD-WAN Appliance 10.2.x before
10.2.6 and 11.0.x before 11.0.3

Affected Versions:

  o All versions of NetScaler SD-WAN 10.0.x and earlier *
  o All versions of Citrix SD-WAN 10.1.x *
  o All versions of Citrix SD-WAN 10.2.x earlier than 10.2.6
  o All versions of Citrix SD-WAN 11.0.x earlier than 11.0.3

* Upgrade to 10.2.6, 11.0.3, or newer for security update

Mitigating Factors

In order to protect against these vulnerabilities and web application related
issues, Citrix recommends access to the management interface be restricted. In
situations where customers have deployed their appliances in line with industry
best practice, network access to this interface should already be restricted
and default system certificates should be replaced by certificates from a
reputable Certificate Authority.

Security Best Practices:

10.2.x - https://docs.citrix.com/en-us/citrix-sd-wan/10-2/best-practices/

11.x - https://docs.citrix.com/en-us/citrix-sd-wan/11/best-practices/

What Customers Should Do

This vulnerability has been addressed in the following software versions:

  o Citrix SD-WAN 10.2.6
  o Citrix SD-WAN 11.0.3

Citrix strongly recommends that customers using vulnerable combinations of
hardware and software upgrade their appliances to a fixed version or later as
soon as possible.

Citrix also recommends that customers either: replace default system
certificates by uploading and installing certificates from a reputable
Certificate Authority, or regenerate their self-signed certificate. The
functionality for both actions can be accessed at: Configuration> Appliance
Settings> Administrator Interface> HTTPS Certs in the SD-WAN appliance GUI as
described in the Best Practices Guide under section "Secure administrator

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 to trusted
network traffic only.


|Date                               |Change                                   |
|9th January 2020                   |Initial Publication                      |

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