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Websense Content Gateway Error Message Cross Site Scripting

Websense Content Gateway Error Message Cross Site Scripting
Posted Mar 19, 2015
Authored by Han Sahin

Websense Content Gateway error messages are vulnerable to cross site scripting.

tags | exploit, xss
SHA-256 | 58f600eaed898f1ca351c4b8d1cbec131fbfe943f225520c81a41f29a0067a03

Websense Content Gateway Error Message Cross Site Scripting

Change Mirror Download
------------------------------------------------------------------------
Error messages of Websense Content Gateway are vulnerable to Cross-Site
Scripting
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Han Sahin, September 2014

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
It was discovered that the error messages of Websense Content Gateway
process user-controllable data insecurely, rendering these pages
vulnerable to Cross-Site Scripting. Cross-Site Scripting allows an
attacker to perform a wide variety of actions, such as stealing the
victim's session token or login credentials, performing arbitrary
actions on the victim's behalf, and logging their keystrokes.

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Tested versions
------------------------------------------------------------------------
This issue was discovered on Websense Triton v7.8.3 and Websense
appliance modules V-Series v7.7. Other versions may be affected as well.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
This issue is resolved in TRITON APX Version 8.0. More information about
the fixed can be found at the following location:
http://www.websense.com/support/article/kbarticle/Vulnerabilities-resolved-in-TRITON-APX-Version-8-0

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://www.securify.nl/advisory/SFY20140916/error_messages_of_websense_content_gateway_are_vulnerable_to_cross_site_scripting.html


An example of a vulnerable URL parameter is the admin_msg parameter. The value of this parameter is a Base64 encoded error message. It is possible to include HTML and scripting code in the message, which is used as-is in the resulting error page. An attacker can construct a specially crafted HTML response, that must be encoded using Base64 and appended to the following URL:

https://<target>:8081/configure/ssl_ui/eva-config/client-cert-import_wsoem.html?admin_msg=<payload>

An attacker must trick victims into opening the attacker's specially crafted link. This is for example possible by sending a victim a link in an email or instant message. Once a victim opens the specially crafted link, arbitrary client-side scripting code will be executed in the victim's browser. The attacker-supplied code can perform a wide variety of actions, such as stealing the victim's session tokens or login credentials, performing arbitrary actions on their behalf, logging their keystrokes.
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