Check Point VPN-1 Address Translation Function Discloses Internal IP Addresses to Remote Users
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SecurityTracker Alert ID: 1021273
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SecurityTracker URL: http://securitytracker.com/id?1021273
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Nov 21 2008
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Impact: Disclosure of system information
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Exploit Included: Yes
Vendor Confirmed: Yes
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Version(s): R65
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Description: A vulnerability was reported in Check Point VPN-1. A remote user can determine internal IP addresses.
A remote user can send specially crafted packets to ports on the target system that are mapped using port address translation (PAT)
to ports on an internal system to obtain information about the internal network. Packets with a low time-to-live (TTL) value sent
to a mapped port will cause the target VPN-1 system to return the internal system's actual IP address within an ICMP error message.
Because
TCP port 18264 is typically configured to be mapped to the VPN-1 management server, a remote user can determine the management server's
internal IP address.
The vendor was notified on September 11, 2008.
Tim Brown and Mark Lowe of Portcullis Computer Security
Ltd. reported this vulnerability.
The original advisory is available at:
http://www.portcullis.co.uk/293.php
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Impact: A remote user can determine internal IP addresses.
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Solution: The vendor plans to issued a HotFix within a few days.
A workaround is described in the vendor's advisory.
The vendor's advisory
is available at:
https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk36321
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Vendor URL: www.checkpoint.com/ (Links to External Site)
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Cause: Access control error
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Message History:
None.
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Source Message Contents
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Date: Fri, 21 Nov 2008 10:07:09 -0500
Subject: Checkpoint VPN-1 PAT information disclosure
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http://www.portcullis.co.uk/293.php
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