CVE-2005-3474 in First4Internet XCP DRM
Summary
by MITRE
the aries.sys driver in sony first4internet xcp drm software hides any file registry key or process with a name that starts with "$sys$" which allows attackers to hide activities on a system that uses xcp.
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Analysis
by VulDB Data Team • 07/21/2024
The CVE-2005-3474 vulnerability resides within the aries.sys kernel driver component of Sony's First4Internet XCP Digital Rights Management software, representing a significant security flaw that enables malicious actors to conceal system activities through strategic file and registry manipulation. This vulnerability operates at the kernel level, leveraging the driver's privileged access to hide specific system objects that begin with the "$sys$" naming convention, thereby creating a covert channel for persistent threats to operate undetected within compromised systems.
The technical implementation of this vulnerability stems from improper privilege handling within the kernel driver, where the aries.sys module fails to properly validate or restrict access to system resources based on legitimate operational requirements. This flaw allows any process or thread executing with sufficient privileges to manipulate the registry, file system, and process enumeration mechanisms by simply prefixing targeted objects with "$sys$". The vulnerability directly maps to CWE-264, which addresses permissions, privileges, and access controls, and represents a classic case of privilege escalation through improper access control implementation. The kernel driver essentially provides an unauthorized mechanism for hiding objects from standard system monitoring tools, creating a persistent backdoor that bypasses normal security controls.
The operational impact of this vulnerability extends far beyond simple file hiding, as it enables attackers to maintain long-term presence on compromised systems while evading detection by standard security monitoring solutions. Any malicious activity conducted through the XCP software environment can leverage this functionality to conceal its tracks, including data exfiltration, privilege escalation attempts, or the installation of additional malware components. The vulnerability creates a persistent threat vector that can remain undetected for extended periods, as system administrators and security tools that rely on standard enumeration techniques will fail to discover the hidden objects. This capability directly aligns with tactics described in the MITRE ATT&CK framework under T1564.001 (Hide Artifacts: Hidden Files and Directories) and T1059.001 (Command and Scripting Interpreter: PowerShell), as it provides an effective means of maintaining stealth while executing malicious operations.
Mitigation strategies for CVE-2005-3474 require comprehensive system hardening approaches that address both the immediate vulnerability and broader security posture issues. Organizations should immediately uninstall the affected XCP DRM software and remove all associated kernel drivers from systems, as the vulnerability cannot be patched due to its inclusion in legacy software components. System administrators should implement enhanced monitoring of kernel driver activity and registry changes, particularly focusing on objects with unusual naming patterns that might indicate attempts to leverage this vulnerability. The implementation of behavioral monitoring tools and kernel integrity checking mechanisms becomes essential for detecting unauthorized manipulation of system resources. Additionally, organizations should consider implementing network-based detection measures that can identify suspicious patterns of activity consistent with the exploitation of such hidden persistence mechanisms, as the vulnerability essentially creates a covert communication channel that can be used for command and control operations.