CVE-2006-6618 in AntiHook
Summary
by MITRE
AntiHook 3.0.0.23 - Desktop relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the product s controls on a process by spoofing the (1) ImagePathName, (2) CommandLine, and (3) WindowTitle fields in the PEB.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/10/2018
The vulnerability identified as CVE-2006-6618 affects AntiHook 3.0.0.23 - Desktop software, representing a critical security flaw in process monitoring and control mechanisms. This vulnerability resides in the software's reliance on the Process Environment Block (PEB) for process identification, creating a fundamental weakness that can be exploited by local attackers. The PEB serves as a critical data structure in windows operating systems that contains process-related information, making it a primary target for process monitoring and control software. When AntiHook software depends exclusively on PEB data for process identification, it creates an attack surface that malicious actors can exploit through direct manipulation of this critical system structure.
The technical flaw manifests through the software's inability to properly validate or authenticate the process information contained within the PEB structure. Attackers can manipulate three specific fields within the PEB to bypass the security controls implemented by AntiHook. The ImagePathName field can be altered to disguise the actual executable path of a process, making it appear as a legitimate system process rather than a malicious one. The CommandLine field manipulation allows attackers to modify the command line arguments that would normally identify suspicious process behavior or execution parameters. The WindowTitle field spoofing enables attackers to change the displayed window title of a process, further obfuscating their activities from security monitoring systems. This three-pronged approach to PEB manipulation demonstrates a sophisticated understanding of windows process management internals and represents a direct exploitation of the software's trust in system data structures.
The operational impact of this vulnerability extends beyond simple bypass of security controls, creating a significant risk for system integrity and monitoring capabilities. Local users who exploit this vulnerability can effectively hide malicious processes from AntiHook's detection mechanisms, potentially allowing persistent threats to operate undetected within the system. This weakness undermines the fundamental purpose of process monitoring software, which is to provide visibility into system activities and detect anomalous behavior. The vulnerability particularly affects enterprise environments where process monitoring is critical for security operations, as it allows attackers to evade security controls that would normally detect suspicious process execution patterns. The implications are especially severe given that this is a local privilege escalation vector that can be exploited by users who already have system access, making it a particularly dangerous weakness in security software designed to protect against such threats.
Mitigation strategies for this vulnerability require both immediate software patches and architectural improvements to process monitoring systems. The primary solution involves updating AntiHook software to implement additional verification mechanisms beyond simple PEB field inspection, including cross-referencing with actual process file system locations and implementing more robust process validation techniques. Security professionals should consider implementing additional monitoring layers that can detect inconsistencies between PEB data and actual process behavior, aligning with defense-in-depth principles outlined in cybersecurity frameworks. The vulnerability demonstrates the importance of avoiding single points of failure in security controls, as relying solely on PEB data creates a predictable attack vector that can be easily exploited. Organizations should also implement process monitoring solutions that can detect and alert on PEB manipulation attempts, utilizing techniques such as memory integrity checking and behavioral analysis to identify anomalous process activities that may indicate exploitation attempts. This vulnerability aligns with CWE-284 (Improper Access Control) and represents a classic case of trusting unverified system data structures, making it a prime example of why security controls must be designed with multiple verification layers to prevent bypass attacks. The ATT&CK framework would categorize this as a technique for privilege escalation and defense evasion, specifically targeting process injection and process manipulation methods that allow adversaries to remain undetected within target systems.