Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.3238.4
CTX239002 - Cross-Site Scripting Vulnerability in Citrix NetScaler
16 November 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Citrix NetScaler Gateway
Publisher: Citrix
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-18517
Original Bulletin:
https://support.citrix.com/article/CTX239002
Revision History: November 16 2018: Updated applicable products
November 6 2018: Updated description to include Citrix ADC
October 30 2018: Updated description and version numbering
October 24 2018: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
CTX239002
Cross-Site Scripting Vulnerability in Citrix NetScaler
Security Bulletin | Medium
Created: 23 Oct 2018 | Modified: 15 Nov 2018
Applicable Products
o NetScaler 10.5
o NetScaler 11.1
o NetScaler 12.0
o NetScaler 12.1
o Citrix ADC
Description of Problem
A Cross-Site Scripting (XSS) vulnerability has been identified in Citrix
NetScaler Gateway, formerly known as Citrix Access Gateway Enterprise Edition
and Citrix ADC formerly known as NetScaler ADC, that if exploited by an
attacker with access to the NetScaler administrative user interface including
the management interface, could potentially be used to execute malicious
client-side script in the same context as legitimate content from the web
server; if this vulnerability is used to execute script in the browser of an
authenticated user then the script may be able to gain access to the
authenticated user's session or other potentially sensitive information.
This vulnerability has been assigned the following CVE number:
o CVE-2018-18517: Cross-Site Scripting vulnerability in Citrix NetScaler
Gateway
This vulnerability is present in the following versions of Citrix NetScaler
Gateway and Citrix ADC:
10.5.x earlier than version 10.5.69.3
11.1.x earlier than version 11.1.59.10
12.0.x earlier than version 12.0.58.18
12.1.x earlier than version 12.1.49.23
What Customers Should Do
This vulnerability has been addressed in new versions of the Citrix NetScaler
Gateway and Citrix ADC software. Citrix recommends that customers upgrade their
Citrix NetScaler Gateway and Citric ADC appliances to one of the following
versions:
10.5.69.3 and later
11.1.59.10 and later
12.0.58.18 and later
12.1.49.23 and later
These upgrades can be obtained from the Citrix website at the following
location:
Citrix NetScaler Gateway:
https://www.citrix.com/downloads/citrix-gateway/product-software.html
Citrix ADC:
https://www.citrix.com/downloads/citrix-adc/
Please note that a MyCitrix account is required to access this location.
Mitigating Factors
In order to exploit this vulnerability, an attacker would require access to the
management interface of the NetScaler. In situations where customers have
deployed their NetScaler Gateway appliances in line with industry best
practice, network access to this interface should already be restricted.
Acknowledgements
Citrix thanks Davide Peruzzi of gosecure.it for working with us on
CVE-2018-18517 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/.
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.
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 |
+-----------------------+-----------------------------------------------------+
|October 23rd 2018 |Initial bulletin published |
+-----------------------+-----------------------------------------------------+
|October 25th 2018 |Updated description and version numbering |
+-----------------------+-----------------------------------------------------+
|November 5th 2018 |Updated description to include Citrix ADC |
+-----------------------+-----------------------------------------------------+
|November 15th 2018 |Updated applicable products |
+-----------------------+-----------------------------------------------------+
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQIVAwUBW+4N02aOgq3Tt24GAQjgtA//Ro8GvmOFrNAlKeNGnl0xpYP95Oh1XT1I
Wr+bsSdrOoxGtMvcU+i2htApEmjozjSk4eDkAKtFDCo/Mcv2Ymq/9K8w2b3BVSZ5
zF3c+22xER61Vn6T0Mqv587ENoWwGTnuDg5ng2ETvNKVq9p2KcAUPBEoE7zko9YX
LN7hhrr5lvxvxDQMYOZouTGQv7vlyMfbSd72N052gp3pDPxrHvYAjOdo8ucvuS8P
EytU/p/7YC9vyWy0Kv50V57ZJGA1uIqikceW82/dJXW8D/tMZqK1ahqRTTyW3tHR
W8G5h7qLKN2OC+DUaoULMh+lOSYC26cKfe9ozkDM6eY1CcyrrgI025qir86QnGVh
tCUFLq/cUkL+H1uEo7oBPq+Rn7/rDcMYX6ZI6XUVzTjyd52Dqqdcz8w9+hc3euXY
0SLllMcVLV70VtVloDBBBYtsMU3BDOqrwUlFdpidrfQUy7W2VohgrT9qrLi1gT5H
P97H3d/+AfJ7+PNTVePXkda9OjolaHbsFooFXWdPLXhil9Xh3B+DoYa/UjFtX7gF
y0gqIj98C+y7Jdpy/bgg8xOrrzD+3hraLyyc8caNVIuf7FgiI5xBnSHPYNlyVVFT
j/Z4ycsbUP3l61wEAOdEwQWw8t2JIIve2WH6IPmCXa5CkQKjNxLj0ODoYGQf26qY
EIG/UU1drKI=
=Na0i
-----END PGP SIGNATURE-----