VAR-200702-0107
Vulnerability from variot - Updated: 2023-12-18 13:25cmdmon.sys in Comodo Firewall Pro (formerly Comodo Personal Firewall) before 2.4.16.174 does not validate arguments that originate in user mode for the (1) NtConnectPort and (2) NtCreatePort hooked SSDT functions, which allows local users to cause a denial of service (system crash) and possibly gain privileges via invalid arguments. Comodo Firewall is prone to multiple denial-of-service vulnerabilities because it fails to adequately validate user supplied data. Exploiting these issues may permit attackers to cause system crashes and deny service to legitimate users. Presumaby, attackers may also be able to execute arbitrary code, but this has not been confirmed. Comodo Firewall Pro 2.4.16.174 and Comodo Personal Firewall 2.3.6.81 are vulnerable; other versions may also be affected. The Comodo firewall hooks many functions in SSDT, and there are at least 7 cases where there are no parameters for verifying user mode. Due to a bug in the cmdmon.sys driver, a denial of service may result when calling NtConnectPort, NtCreatePort, NtCreateSection, NtOpenProcess, NtOpenSection, NtOpenThread, and NtSetValueKey
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