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Category:   Application (Firewall)  >   FireWall-1/VPN-1 Vendors:   Check Point
FireWall-1/VPN-1 Input Validation Hole in PKI Web Service Lets Remote Users View Files on the Underlying System
SecurityTracker Alert ID:  1016563
SecurityTracker URL:
CVE Reference:   CVE-2006-3885   (Links to External Site)
Updated:  Jun 13 2008
Original Entry Date:  Jul 24 2006
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): R55W HFA2 and prior
Description:   A vulnerability was reported in FireWall-1/VPN-1. A remote user can view files on the target system.

The software does not properly validate user-supplied input on the built-in web server that runs on TCP port 18264. A remote user can supply a request containing specially crafted hex-encoded characters to view files on target system.

The original advisory is available at:

Pete Foster of Sec-Tec Ltd reported this vulnerability.

Impact:   A remote user can view files on the target system.
Solution:   The vendor silently fixed this vulnerability in R55W HFA03.
Vendor URL: (Links to External Site)
Cause:   Access control error, Input validation error

Message History:   None.

 Source Message Contents

Subject:  Check Point R55W Directory Traversal


Check Point Firewall-1 R55W contains a hard coded web server, which runs on
TCP port 18264. This server is there to deal with PKI requirements for Check
Point's VPN functionality.

During a routine penetration test of a client, Sec-Tec discovered a
directory traversal vulnerability that allows a potential attacker to
retrieve files from the underlying OS.

This issue is potentially serious for a number of reasons:

1. Check Point's "rule zero" will often by default allow access to this port
for external IP addresses.

2. It would currently seem that there are few restrictions as to what files
can be retrieved via this mechanism (Sec-Tec were able to obtain the
underlying OS' account repository).


The issue can be exploited via a web browser using typical hex encoded
directory traversal strings.

Affected Version(s):

Check Point R55W
Check Point R55W HFA1
Check Point R55W HFA2

(Confirmed on Windows 2003 Server platform, other platforms may be

Current Status

Check Point have confirmed that this issue was corrected in R55W HFA03.
However, Sec-Tec have been unable to find any publicly available references
to this issue, either within Check Point's knowledge base or HFA03 release

Updates to this issue will be found at:

Pete Foster
Senior Consultant
Sec-Tec Ltd


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