Vulnerability Note VU#310295

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.

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.

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.

Solution

Apply patch from vendor.

Systems Affected (Learn More)

Vendor	Status	Date Notified	Date Updated
Check Point	Affected	11 Jun 2001	09 Jul 2001

If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group	Score	Vector
Base	N/A	N/A
Temporal	N/A	N/A
Environmental	N/A	N/A

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

• CVE IDs: CVE-2001-1158
• CERT Advisory: CA-2001-17
• Date Public: 09 Jul 2001
• Date First Published: 09 Jul 2001
• Date Last Updated: 09 Apr 2003
• Severity Metric: 51.30
• Document Revision: 57