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Vulnerability of Outpost Firewall: bypassing protection

Synthesis of the vulnerability 

A local attacker can use a DLL injection in order to bypass Outpost Firewall protection, then to deactivate it.
Impacted systems: Outpost Firewall.
Severity of this alert: 1/4.
Creation date: 04/12/2006.
Références of this alert: BID-21390, VIGILANCE-VUL-6365.

Description of the vulnerability 

The Outpost firewall checks if a local attacker does not try to modify memory of a process to inject the name of a DLL to load.

However, this protection is not efficient if a ".dll" string is already in memory. A attacker, allowed to write in the Windows system directory and allowed to debug a program, can indeed reference this string to load a malicious library.

An attacker can for example use this vulnerability against the outpost.exe process in order to deactivate it.
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This threat impacts software or systems such as Outpost Firewall.

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

The trust level is of type unique source, with an origin of user shell.

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 cybersecurity bulletin.

Solutions for this threat 

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