CVE-2019-1087 in Windows
Summary
by MITRE
An elevation of privilege exists in Windows Audio Service, aka 'Windows Audio Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1086, CVE-2019-1088.
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Analysis
by VulDB Data Team • 07/02/2020
The Windows Audio Service Elevation of Privilege Vulnerability represents a critical security flaw within the Windows operating system that allows attackers to escalate their privileges from a standard user account to system-level access. This vulnerability specifically affects the Windows Audio Service component, which is responsible for managing audio playback and recording functions across the system. The flaw exists in the service's handling of certain audio-related operations and authentication mechanisms, creating an exploitable path for privilege escalation attacks.
The technical implementation of this vulnerability stems from improper access control mechanisms within the Windows Audio Service. When the service processes certain audio-related requests or handles specific file operations, it fails to properly validate the privileges of the requesting user or process. This weakness allows a local attacker with standard user privileges to manipulate the service in ways that bypass normal security boundaries. The vulnerability is particularly concerning because audio services are typically running with elevated privileges to ensure proper multimedia functionality, but the service does not adequately verify that incoming requests originate from legitimate system processes or users with appropriate authorization levels. This flaw can be exploited through carefully crafted audio operations that trigger the service to perform actions with higher privileges than intended.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with the foundation for more sophisticated attacks within the compromised system. Once an attacker achieves system-level privileges through this vulnerability, they can access all system resources, modify critical files, install malicious software, and potentially establish persistent backdoors. The vulnerability affects multiple Windows versions including Windows 10 and Windows Server 2019, making it a widespread concern for enterprise environments. Attackers can leverage this vulnerability to conduct reconnaissance, escalate their access further within the network, or deploy additional malware without requiring initial administrative credentials. The stealthy nature of audio service operations makes detection particularly challenging, as the exploitation may not trigger obvious security alerts that would normally flag suspicious activities.
Mitigation strategies for this vulnerability primarily involve applying the official security updates released by Microsoft through Windows Update or Microsoft Update Catalog. Organizations should prioritize patch management and ensure all systems receive the relevant security patches immediately upon release. Additionally, implementing the principle of least privilege can help limit the potential impact of such vulnerabilities by reducing the number of accounts with elevated privileges. System administrators should also consider disabling unnecessary audio services when they are not required for specific operations, and monitor for unusual audio service activity that might indicate exploitation attempts. The vulnerability aligns with CWE-276, which addresses improper privilege management, and can be mapped to ATT&CK technique T1068, which covers local privilege escalation through service exploitation. Organizations should also implement network monitoring solutions that can detect anomalous audio service behavior and establish robust incident response procedures to address potential exploitation attempts.