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Comodo Antivirus versions 184.108.40.20682 and below are vulnerable to Denial of Service affecting CmdGuard.sys via its filter port "cmdServicePort". A low privileged process can crash CmdVirth.exe to decrease the port's connection count followed by process hollowing a CmdVirth.exe instance with malicious code to obtain a handle to "cmdServicePort". Once this occurs, a specially crafted message can be sent to "cmdServicePort" using "FilterSendMessage" API. This can trigger an out-of-bounds write if lpOutBuffer parameter in FilterSendMessage API is near the end of specified buffer bounds. The crash occurs when the driver performs a memset operation which uses a size beyond the size of buffer specified, causing kernel crash.
Base Score: 4.9
Impact Score: 6.9
Exploitability Score: 3.9
Base Score: 5.5
Impact Score: 3.6
Exploitability Score: 1.8
cpe:2.3:a:comodo:antivirus:*:*:*:*:*:*:*:* versions up to 220.127.116.1182 (inclusive)