CVE-2001-1431

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2001-10-08 · updated 2026-06-16

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.

Affected products

checkpoint Firewall-1: 4.1-sp3, 4.1-sp4, 4.1-sp5
checkpoint Vpn-1: 4.1-sp3, 4.1-sp4
Nokia Firewall Appliance: ipso_3.3, ipso_3.4, ipso_3.41

References

http://www.kb.cert.org/vuls/id/258731
https://exchange.xforce.ibmcloud.com/vulnerabilities/8293
http://www.kb.cert.org/vuls/id/258731
https://exchange.xforce.ibmcloud.com/vulnerabilities/8293

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