[Full-disclosure] Comodo Bypassing settings protection using magic pipe Vulnerability

[Matousec - Transparent security Research <research@xxxxxxxxxxxx>]

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 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




More details and a proof of concept including its source code are available 
here:
http://www.matousec.com/info/advisories/Comodo-Bypassing-settings-protection-using-magic-pipe.php


Regards,

-- 
Matousec - Transparent security Research
http://www.matousec.com/

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/