Vulnerability Note VU#310295

Check Point RDP Bypass Vulnerability

Overview

Check Point VPN-1/FireWall-1 version 4.0 & 4.1 may allow an intruder to pass traffic through the firewall on port 259.

I. Description

Firewall-1 and VPN-1 include support for RDP, but do not provide adequate security controls for RDP data. By adding a faked RDP header to typical UDP traffic, any content can be passed to port 259 on any host on either side of the device.

II. Impact

An attacker who exploits this vulnerability can build a tunnel to bypass the firewall and pass traffic to and from arbitrary hosts on either side of the firewall on port 259.

III. Solution

Apply patch from vendor.

Systems Affected

Vendor	Status	Date Notified	Date Updated
Check Point	Vulnerable	9-Jul-2001

References

http://www.securityfocus.com/bid/2952
http://www.inside-security.de/advisories/fw1_rdp.html
http://www.checkpoint.com/techsupport/alerts/

Credit

The vulnerability was discovered by Jochen Bauer <jtb@inside-security.de> and Boris Wesslowski <bw@inside-security.de> of Inside Security GmbH Stuttgart, Germany.

This document was written by Ian A. Finlay.

Other Information

Date Public:	2001-07-09
Date First Published:	2001-07-09
Date Last Updated:	2003-04-09
CERT Advisory:	CA-2001-17
CVE-ID(s):	CVE-2001-1158
NVD-ID(s):	CVE-2001-1158
US-CERT Technical Alerts:
Metric:	51.30
Document Revision:	57

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