What’s Vulnerable › Vulnerabilities

CVE-2000-0804

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2000-11-14 · updated 2026-06-16

Description

Check Point VPN-1/FireWall-1 4.1 and earlier allows remote attackers to bypass the directionality check via fragmented TCP connection requests or reopening closed TCP connection requests, aka "One-way Connection Enforcement Bypass."

Affected products

• checkpoint Firewall-1: 3.0, 4.0, 4.1

References

• http://www.checkpoint.com/techsupport/alerts/list_vun.html#One-way_Connection
• http://www.osvdb.org/4419
• https://exchange.xforce.ibmcloud.com/vulnerabilities/5468
• http://www.checkpoint.com/techsupport/alerts/list_vun.html#One-way_Connection
• http://www.osvdb.org/4419
• https://exchange.xforce.ibmcloud.com/vulnerabilities/5468

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