CVE-2016-3231 in Windows
Summary
by MITRE
The Standard Collector service in Windows Diagnostics Hub mishandles library loading, which allows local users to gain privileges via a crafted application, aka "Windows Diagnostics Hub Elevation of Privilege Vulnerability."
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Analysis
by VulDB Data Team • 08/23/2022
The vulnerability identified as CVE-2016-3231 resides within the Windows Diagnostics Hub Standard Collector service, a component designed to collect diagnostic information from various system sources. This service operates with elevated privileges and is responsible for managing diagnostic data collection across Windows systems. The flaw manifests in how the service handles dynamic library loading operations, creating a path for local privilege escalation attacks. Security researchers have categorized this vulnerability under CWE-427 Uncontrolled Search Path Element, which describes situations where an application searches for libraries in predictable locations that can be manipulated by attackers. The vulnerability affects multiple Windows versions including Windows 7, Windows 8, Windows 8.1, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2.
The technical exploitation of this vulnerability occurs when a local attacker crafts a malicious application that manipulates the library loading process of the Standard Collector service. The service, running with system-level privileges, loads libraries from predictable search paths without proper validation of their authenticity or integrity. An attacker can place a malicious DLL in a location that the service will search through, causing it to execute arbitrary code with elevated privileges. This represents a classic case of DLL hijacking where the attacker leverages the service's trust in its library search paths to gain unauthorized access to system resources. The vulnerability specifically impacts the service's handling of dynamic link library loading sequences, allowing attackers to inject malicious code that executes with system-level privileges rather than the typical user privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with persistent access to system resources that can be leveraged for further attacks. Once an attacker achieves system-level privileges through this vulnerability, they can modify system files, install additional malware, or establish persistence mechanisms within the compromised system. The vulnerability's local nature means that attackers do not require network access or complex remote exploitation techniques, making it particularly dangerous in environments where local access is possible. This characteristic aligns with ATT&CK technique T1068, which describes the use of local privilege escalation techniques to gain elevated system access. The vulnerability also represents a significant concern for enterprise environments where the Standard Collector service may be running with elevated privileges and where local access controls are insufficient to prevent exploitation.
Mitigation strategies for CVE-2016-3231 focus on both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities. Microsoft released a security update that addresses the library loading issue by implementing proper validation of library paths and ensuring that the service does not load libraries from untrusted locations. Organizations should ensure that all systems are patched with the appropriate security updates and that the Windows Diagnostics Hub service is properly configured to limit its attack surface. The vulnerability highlights the importance of implementing least privilege principles for system services and conducting regular security assessments of critical system components. Additionally, implementing application whitelisting policies can prevent unauthorized DLL loading operations, while monitoring for suspicious library loading patterns can help detect exploitation attempts. The vulnerability serves as a reminder of the critical importance of secure coding practices, particularly in system services that operate with elevated privileges and handle dynamic library loading operations.