[TOOL] AuthentProtect, ISAPI Authentication Filter

From: support@securiteam.com
Date: 03/11/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Mon, 11 Mar 2002 23:25:06 +0100 (CET)

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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  AuthentProtect, ISAPI Authentication Filter
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DETAILS

 <http://bob.firstcodings.com/programs/authentprotect/> AuthentProtect is
a small ISAPI filter that denies IIS authentication based on given
usernames. It is mainly intended to block brute force attack against users
for which NTFS permissions cannot be revoked (mainly administrators) for
more information on an NTLM based username and password attack see:
<http://www.securiteam.com/windowsntfocus/5UP011P6KI.html> Considerations
for IIS Authentication.

How it works:
AuthentProtect is based on the "onAuthentication" event from ISAPI, so
that it can deny access before IIS handle the request. Usernames that are
denied to authenticate through IIS are customizable through config file.
If no config file is found, the filter denies access to "administrator"
and "administrateur" (for French people).

ADDITIONAL INFORMATION

The tool can be downloaded from:
 <http://bob.firstcodings.com/programs/authentprotect/>
http://bob.firstcodings.com/programs/authentprotect/

The information has been provided by <mailto:bob@firstcodings.com> Bob at
firstcodings.

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