CVE-2006-4184 in DeviceLock
Summary
by MITRE
SmartLine DeviceLock before 5.73 Build 305 does not properly enforce access control lists (ACL) in raw mode, which allows local users to bypass NTFS controls and obtain sensitive information.
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Analysis
by VulDB Data Team • 08/02/2018
The vulnerability identified as CVE-2006-4184 affects SmartLine DeviceLock software version 5.73 Build 305 and earlier, presenting a critical access control flaw that undermines the security of Windows NTFS file systems. This issue resides in the raw mode implementation where the application fails to properly enforce access control lists, creating a pathway for local attackers to circumvent the operating system's built-in security mechanisms. The flaw represents a significant deviation from expected security behavior where the software should respect the NTFS permissions and access controls that govern file and directory access. When DeviceLock operates in raw mode, it should maintain the integrity of the underlying file system's permission model while providing its own security controls. However, the vulnerability allows malicious local users to bypass these protections entirely, effectively nullifying the NTFS access control mechanisms that are fundamental to Windows security architecture.
The technical implementation of this vulnerability stems from improper handling of access control lists within the raw mode functionality of DeviceLock. In raw mode, the software operates at a lower level where it directly accesses storage devices without the normal file system abstractions. This mode of operation should maintain strict adherence to existing access controls, but the flaw allows unauthorized access to files and directories that should be protected by NTFS permissions. The vulnerability specifically affects the enforcement of access control lists, which are critical components of the Windows security model that define who can access what resources and what actions they can perform. This failure creates a privilege escalation path where local users can read sensitive information that should be restricted to authorized personnel only, potentially exposing confidential data, system configurations, or other protected resources.
The operational impact of this vulnerability extends beyond simple information disclosure, as it fundamentally undermines the security posture of systems running affected DeviceLock versions. Local users who exploit this vulnerability can access sensitive information that might include system configuration files, user data, application-specific information, or other protected resources that are normally secured by NTFS access controls. This capability represents a significant risk to organizations as it allows attackers with local access to bypass the normal security boundaries that protect their systems. The vulnerability is particularly concerning because it operates at the file system level, meaning that any sensitive data stored on the affected system could potentially be accessed by unauthorized local users. The impact is further amplified because the flaw exists within a security tool designed to protect systems, making it a particularly dangerous compromise of trust. This vulnerability essentially creates a backdoor that allows local users to circumvent the very protections that the software is meant to provide, creating a paradoxical security weakness in a security product.
Mitigation strategies for this vulnerability require immediate action to upgrade to SmartLine DeviceLock version 5.73 Build 305 or later, which contains the necessary patches to properly enforce access control lists. Organizations should also implement additional monitoring to detect unauthorized access attempts and ensure that the DeviceLock configuration properly enforces access controls even when operating in raw mode. System administrators should review existing access control policies and ensure that the principle of least privilege is maintained across all systems. The vulnerability aligns with CWE-284, which addresses improper access control in software systems, and relates to ATT&CK technique T1068, which involves local privilege escalation through exploitation of system vulnerabilities. Security teams should also consider implementing additional security controls such as mandatory access controls, enhanced logging, and regular security audits to detect and prevent exploitation of similar vulnerabilities. Given that this vulnerability affects a security tool, organizations should also review their overall security posture and consider implementing defense-in-depth strategies that do not rely solely on any single security control mechanism.