CVE-2004-0309: Zonelabs Integrity

High severity, CVSS 10.0. EPSS: 8.8% chance of exploitation in the next 30 days.

Stack-based buffer overflow in the SMTP service support in vsmon.exe in Zone Labs ZoneAlarm before 4.5.538.001, ZoneLabs Integrity client 4.0 before 4.0.146.046, and 4.5 before 4.5.085, allows remote attackers to execute arbitrary code via a long RCPT TO argument.

Affected products

• Zonelabs Integrity: version 4.0 only
• Zonelabs Zonealarm: version 4.0 only; version 4.5 only

Published 2004-11-23. Last modified 2026-06-16.