[Full-disclosure] ISS BlackICE PC Protection Filelock protection bypass Vulnerability

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

Hello,

We would like to inform you about a vulnerability in ISS BlackICE PC Protection.


Description:

BlackICE PC Protection protects its files against manipulation by malicious 
software. Its critical files like its 
database of trusted applications or firewall configuration are protected. The 
list of protected files is stored in 
filelock.txt in the BlackICE installation directory. If this file is deleted 
files mentioned in filelock.txt are not 
protected any more and can be changed by malicious applications. The 
implemented protection allows malicious 
applications to delete this file using native API function ZwDeleteFile. This 
can result in a bypass of all BlackICE 
protection mechanisms because its internal componenets can be replaced with 
fake copies. The situation is even easier 
for the attacker because the component control fails to recognize fake 
components in BlackICE processes.


Vulnerable software:

     * BlackICE PC Protection 3.6.cpu
     * BlackICE PC Protection 3.6.cpj
     * probably all versions of BlackICE PC Protection 3.6
     * possibly older versions of BlackICE PC Protection


More details and a proof of concept including source code is available here: 
http://www.matousec.com/info/advisories/BlackICE-Filelock-protection-bypass.php


Regards,

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

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