CVE-2019-1022 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-2019-1007, CVE-2019-1021, CVE-2019-1026, CVE-2019-1027, CVE-2019-1028.
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Analysis
by VulDB Data Team • 05/20/2025
The Windows Audio Service elevation of privilege vulnerability represents a critical security flaw within Microsoft's Windows operating system that allows local attackers to escalate their privileges from standard user level to system level execution. This vulnerability specifically targets the Windows Audio Service component which is responsible for managing audio playback and recording functionalities across the system. The flaw exists in the service's handling of specific audio-related operations and its interaction with the Windows kernel, creating an opportunity for malicious actors to exploit insufficient access controls and privilege validation mechanisms. The vulnerability is particularly concerning because it operates at the kernel level where elevated privileges are required for system-level operations, making it a prime target for attackers seeking to gain complete control over affected systems.
The technical implementation of this vulnerability stems from improper privilege validation within the Windows Audio Service when processing certain audio-related commands and data structures. Attackers can exploit this flaw by crafting malicious audio data or commands that trigger a privilege escalation path through the service's processing pipeline. The vulnerability manifests when the audio service fails to properly validate the privileges of incoming requests or when it improperly handles specific audio buffer operations that should be restricted to system-level processes only. This weakness can be leveraged through various attack vectors including malicious audio files, crafted audio drivers, or exploitation of the service's interaction with other system components. The flaw essentially creates a pathway where unprivileged user processes can manipulate audio service operations to execute code with elevated privileges, bypassing standard Windows security mechanisms such as user access control and privilege separation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with complete system control capabilities that can be used for persistent access, data exfiltration, and further exploitation within network environments. Once an attacker achieves system-level privileges through this vulnerability, they can modify system files, install malware, disable security features, and establish backdoors that persist across system reboots. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern for organizations that have not yet applied the necessary security patches. The attack surface is particularly broad since audio services are commonly enabled and used across various system configurations, including enterprise environments where audio functionality is integral to business operations. This vulnerability can be exploited in both targeted attacks against specific systems and mass exploitation campaigns, as it requires minimal user interaction and can be automated through various attack frameworks.
Mitigation strategies for this vulnerability should prioritize immediate patch application from Microsoft's security updates, as the primary fix involves correcting the privilege validation logic within the Windows Audio Service. Organizations should implement comprehensive monitoring of audio service activities and network traffic for suspicious patterns that might indicate exploitation attempts. Security hardening measures should include disabling unnecessary audio services, implementing strict access controls for audio-related system components, and deploying application whitelisting policies to prevent execution of unauthorized audio processing applications. The vulnerability aligns with CWE-276 which addresses improper privileges and CWE-787 which covers out-of-bounds write conditions that can lead to privilege escalation. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques including service execution and exploitation of software vulnerabilities, representing a significant threat to enterprise security posture and requiring immediate attention from security operations teams.