[NT] Technical Details of BadBlue EXT.DLL Vulnerability

From: support@securiteam.com
Date: 07/09/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue,  9 Jul 2002 08:08:05 +0200 (CEST)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Technical Details of BadBlue EXT.DLL Vulnerability
------------------------------------------------------------------------

SUMMARY

 <http://www.badblue.com/> BadBlue is a file sharing web server. A
vulnerability exists in how EXT.DLL sanitizes input for HTX/HTS pages. Any
user input is inserted un-sanitized, making any HTX or HTS pages that
display output vulnerable to attack.

DETAILS

Vulnerable systems:
 * BadBlue version 1.7.2 and prior

Immune systems:
 * BadBlue version 1.7.3

Example:
Webmasters can test for the vulnerability by running a search query
containing HTML/script (e.g. "alert('vulnerable!');" would do, note that
we replaced the 'i' with '!').
If the search results page displays a JavaScript Alert, your server could
be used in attacks against visiting browsers.

ADDITIONAL INFORMATION

The information has been provided by <mailto:mattmurphy@kc.rr.com>
Matthew Murphy.

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