{"id":"CVE-2001-1431","aliases":["EUVD-2001-1411","GHSA-wcw3-c4wg-3jxf"],"status":"published","title":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and...","description":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and VPN-1/FireWall-1 4.1 Service Pack 4, and IPSO 3.4 or IPSO 3.4.1 and VPN-1/FireWall-1 4.1 Service Pack 5, when SYN Defender is configured in Active Gateway mode, does not properly rewrite the third packet of a TCP three-way handshake to use the NAT IP address, which allows remote attackers to gain sensitive information.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01302,"percentile":0.70667,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2001-10-08T04:00:00Z","modified":"2026-06-16T21:56:15Z","products":[{"vendor":"checkpoint","product":"firewall-1"},{"vendor":"checkpoint","product":"vpn-1"},{"vendor":"nokia","product":"firewall_appliance"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/8293","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.kb.cert.org/vuls/id/258731","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-1431"},{"url":"https://github.com/advisories/GHSA-wcw3-c4wg-3jxf"}],"sources":{"cve":[{"id":"CVE-2001-1431","description":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and VPN-1/FireWall-1 4.1 Service Pack 4, and IPSO 3.4 or IPSO 3.4.1 and VPN-1/FireWall-1 4.1 Service Pack 5, when SYN Defender is configured in Active Gateway mode, does not properly rewrite the third packet of a TCP three-way handshake to use the NAT IP address, which allows remote attackers to gain sensitive information.","status":"published","published":"2005-03-24T05:00:00Z","modified":"2024-08-08T04:58:11.03Z","updated_at":"2026-11-02T14:34:42.354707Z"}],"euvd":[{"id":"EUVD-2001-1411","description":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and VPN-1/FireWall-1 4.1 Service Pack 4, and IPSO 3.4 or IPSO 3.4.1 and VPN-1/FireWall-1 4.1 Service Pack 5, when SYN Defender is configured in Active Gateway mode, does not properly rewrite the third packet of a TCP three-way handshake to use the NAT IP address, which allows remote attackers to gain sensitive information.","status":"published","published":"2005-03-24T05:00:00Z","modified":"2024-08-08T04:58:11Z","updated_at":"2026-11-03T00:56:27.245824Z"}],"ghsa":[{"id":"GHSA-wcw3-c4wg-3jxf","title":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and...","description":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and VPN-1/FireWall-1 4.1 Service Pack 4, and IPSO 3.4 or IPSO 3.4.1 and VPN-1/FireWall-1 4.1 Service Pack 5, when SYN Defender is configured in Active Gateway mode, does not properly rewrite the third packet of a TCP three-way handshake to use the NAT IP address, which allows remote attackers to gain sensitive information.","status":"published","published":"2022-04-30T18:18:01Z","modified":"2023-01-30T05:05:51Z","updated_at":"2026-11-02T14:47:22.035472Z"}],"nvd":[{"id":"CVE-2001-1431","description":"Nokia Firewall Appliances running IPSO 3.3 and VPN-1/FireWall-1 4.1 Service Pack 3, IPSO 3.4 and VPN-1/FireWall-1 4.1 Service Pack 4, and IPSO 3.4 or IPSO 3.4.1 and VPN-1/FireWall-1 4.1 Service Pack 5, when SYN Defender is configured in Active Gateway mode, does not properly rewrite the third packet of a TCP three-way handshake to use the NAT IP address, which allows remote attackers to gain sensitive information.","status":"published","published":"2001-10-08T04:00:00Z","modified":"2026-06-16T21:56:15.687Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:40.572315Z"}]}}