ZoneAlarm 2.1 through 2.6 and ZoneAlarm Pro 2.4 and 2.6 allows local users to bypass filtering via non-standard TCP packets created with non-Windows protocol adapters.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Zonealarm | Zonelabs | 2.1 (including) | 2.1 (including) |
| Zonealarm | Zonelabs | 2.2 (including) | 2.2 (including) |
| Zonealarm | Zonelabs | 2.3 (including) | 2.3 (including) |
| Zonealarm | Zonelabs | 2.4 (including) | 2.4 (including) |
| Zonealarm | Zonelabs | 2.5 (including) | 2.5 (including) |
| Zonealarm | Zonelabs | 2.6 (including) | 2.6 (including) |