CVE-2006-7129 in BlackICE PC Protection
Summary
by MITRE
ISS BlackICE PC Protection 3.6 cpj and cpu, and possibly earlier versions, allows local users to bypass the protection scheme by using the ZwDeleteFile API function to delete the critical filelock.txt file, which stores information about protected files.
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Analysis
by VulDB Data Team • 05/05/2025
The vulnerability identified as CVE-2006-7129 represents a critical security flaw in ISS BlackICE PC Protection 3.6 and potentially earlier versions that undermines the fundamental protection mechanisms of the software. This weakness specifically targets the file locking system that is essential for maintaining the integrity of protected files within the security framework. The vulnerability arises from the software's insufficient validation of file deletion operations, allowing local attackers to manipulate the protection scheme through legitimate Windows API functions.
The technical exploitation of this vulnerability relies on the ZwDeleteFile API function, which is a native Windows kernel function that provides direct access to file system operations. When local users execute this specific API call against the critical filelock.txt file, they can effectively remove the file that contains crucial information about which files are being protected by the BlackICE system. This file serves as the central registry for all protected elements within the software's scope, making its deletion equivalent to removing the system's ability to track and protect sensitive files. The flaw demonstrates a classic lack of proper access control and privilege validation within the security software itself.
The operational impact of this vulnerability extends beyond simple bypass of protection mechanisms to represent a complete compromise of the software's intended security posture. Once the filelock.txt file is deleted, the BlackICE PC Protection system loses its ability to maintain any protection for files that were previously registered in the system. This creates a window of opportunity for attackers to modify, delete, or otherwise compromise files that should have been protected, effectively neutralizing the security controls that users rely upon. The vulnerability is particularly concerning because it operates at the local user level, meaning that any user with access to the system can exploit this weakness without requiring elevated privileges or specialized attack tools.
From a cybersecurity perspective, this vulnerability aligns with CWE-284, which addresses improper access control issues, and demonstrates how internal security mechanisms can be subverted through legitimate system functions. The attack pattern follows elements of the ATT&CK framework's privilege escalation techniques, specifically targeting the modification of security-critical system files. The vulnerability also reflects poor defensive programming practices where the software fails to implement proper validation of file operations that could compromise its own integrity. Organizations using affected versions of BlackICE PC Protection should immediately implement mitigations including system monitoring for unauthorized file deletion activities, enhanced access controls, and consideration of alternative security solutions that do not exhibit such fundamental design flaws in their protection mechanisms.