CVE-2002-1911: Zonelabs Zonealarm

Medium severity, CVSS 5.0. EPSS: 3.1% chance of exploitation in the next 30 days.

ZoneAlarm Pro 3.0 and 3.1, when configured to block all traffic, allows remote attackers to cause a denial of service (CPU and memory consumption) via a large number of SYN packets (SYN flood). NOTE: the vendor was not able to reproduce the issue.

Affected products

• Zonelabs Zonealarm: version 3.0 only; version 3.1 only

Published 2002-12-31. Last modified 2026-06-16.