We would like to inform you about a vulnerability in Comodo Firewall Pro.
Comodo Firewall Pro (former Comodo Personal Firewall) hooks many functions in SSDT and in at least seven cases it fails to validate arguments that come from the user mode. User calls to NtConnectPort (CFP 22.214.171.124 is not affected), NtCreatePort (CFP 126.96.36.199 is not affected), NtCreateSection, NtOpenProcess, NtOpenSection, NtOpenThread and NtSetValueKey with invalid argument values can cause system crashes because of errors in CFP driver cmdmon.sys. Further impacts of this bug (like arbitrary code execution in the kernel mode) were not examined.
* Comodo Firewall Pro 188.8.131.52 * Comodo Personal Firewall 184.108.40.206 * probably all older versions of Comodo Personal Firewall 2 * possibly older versions of Comodo Personal Firewall
More details and a proof of concept including its source code are available here: http://www.matousec.com/info/advisories/Comodo-Multiple-insufficient-argument-validation-of-hooked-SSDT-functions.php
-- Matousec - Transparent security Research http://www.matousec.com/
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