Kerio Personal Firewall 4 (4.2.0) and Kerio Server Firewall version 1.1.1 are susceptible to a local denial of service vulnerability. Earlier versions are also presumed susceptible.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40699/kerio-fwdrv-dos-adv.txt
Source: https://packetstormsecurity.com/files/40699/kerio-fwdrv-dos-adv.txt.html