CVE-1999-0770

Checkpoint Firewall-1 - Denial of Service via Long Timeout on Non-SYN Connection Attempts

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-1999-0770. PoCs published by Lance Spitzner.

AI-analyzed exploit summary This is a writeup describing a denial of service vulnerability in Checkpoint Firewall-1. The exploit involves sending ACK packets to fill the firewall's connection table, causing it to refuse subsequent connections.

Description

Firewall-1 sets a long timeout for connections that begin with ACK or other packets except SYN, allowing an attacker to conduct a denial of service via a large number of connection attempts to unresponsive systems.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Lance Spitzner · textdoshardware
https://www.exploit-db.com/exploits/19436

This is a writeup describing a denial of service vulnerability in Checkpoint Firewall-1. The exploit involves sending ACK packets to fill the firewall's connection table, causing it to refuse subsequent connections.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Checkpoint Firewall-1 4.0 SP3
No auth needed
Prerequisites: Access to an internal system with root privileges · nmap installed
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/1027
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/549

Scores

EPSS 0.0107
EPSS Percentile 60.9%

Details

Status published
Products (2)
checkpoint/firewall-1 3.0
checkpoint/firewall-1 4.0
Published Jul 29, 1999
Tracked Since Feb 18, 2026