Advisory 2007-03-01.01

Comodo Bypassing settings protection using magic pipe Vulnerability

Basic information:

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 2.4.18.184
• Comodo Firewall Pro 2.4.17.183
• Comodo Firewall Pro 2.4.16.174
• Comodo Personal Firewall 2.3.6.81
• probably all older versions of Comodo Personal Firewall 2
• possibly older versions of Comodo Personal Firewall

Events:

• 2007-03-01: Vulnerability confirmed by popular information sources
• 2007-03-01: Advisory released
• 2007-02-15: Vendor notification

References:

• SecuriTeam - Windows NT Focus
• SecurityFocus Vulnerabilities
• Comodo Firewall Pro

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