Comodo Bypassing settings protection using magic pipe Vulnerability

Risk: Medium
Local: Yes
Remote: No
CWE: CWE-Other

CVSS Base Score: 4.4/10
Impact Subscore: 6.4/10
Exploitability Subscore: 3.4/10
Exploit range: Local
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

Hello, We would like to inform you about a vulnerability in Comodo Firewall Pro. Description: Comodo Firewall Pro (former Comodo Personal Firewall) stores some of its internal settings in the registry key HKLM\SYSTEM\Software\Comodo\Personal Firewall. This key is protected by Comodo drivers such that other applications are not able to change the settings. This protection can be bypassed if very special conditions are met. CFP internally uses a named pipe, which name varies, but can be always determined. A process that opens this pipe many times is able to manipulate the protected settings of CFP. A proper modification of the settings will disable all protection mechanisms implemented by CFP after a reboot. Vulnerable software: * Comodo Firewall Pro * Comodo Firewall Pro * Comodo Firewall Pro * Comodo Personal Firewall * 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: tion-using-magic-pipe.php Regards, -- Matousec - Transparent security Research

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