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Vulnerability of Outpost Firewall: altering via ZwSetInformationFile

Synthesis of the vulnerability 

A local attacker can corrupt installation of Outpost Firewall via ZwSetInformationFile().
Vulnerable systems: Outpost Firewall.
Severity of this threat: 1/4.
Creation date: 16/01/2007.
Références of this weakness: BID-22069, CVE-2007-0333, VIGILANCE-VUL-6470.

Description of the vulnerability 

The SSDT Table (System Service Descriptor Table) indicates addresses of functions implementing Windows system calls.

In order to forbid a local attacker to access to installation directory of Outpost Firewall, it hooks some system calls to forbid access to this directory.

However, the ZwSetInformationFile() function can be used to modify SandBox.sys in order to suppress this protection on next reboot.
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This computer weakness bulletin impacts software or systems such as Outpost Firewall.

Our Vigil@nce team determined that the severity of this computer threat announce is low.

The trust level is of type confirmed by a trusted third party, with an origin of user account.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this threat announce.

Solutions for this threat 

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