CVE-2019-1382 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when ActiveX Installer service may allow access to files without proper authentication, aka 'Microsoft ActiveX Installer Service Elevation of Privilege Vulnerability'.
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Analysis
by VulDB Data Team • 02/11/2024
The CVE-2019-1382 vulnerability represents a critical elevation of privilege flaw within Microsoft's ActiveX Installer service, which operates as a core component of the Windows operating system. This vulnerability stems from improper access controls within the ActiveX Installer service that allows unauthorized users to gain elevated system privileges without proper authentication mechanisms. The flaw specifically affects systems where the ActiveX Installer service is running, creating a pathway for malicious actors to bypass standard security boundaries and execute arbitrary code with higher privileges than initially intended.
The technical implementation of this vulnerability resides in the way the ActiveX Installer service handles file access permissions and authentication checks. When the service processes ActiveX installation requests, it fails to properly validate user credentials or enforce appropriate access controls for certain file operations. This weakness enables attackers to manipulate the service into performing actions that should require administrative privileges, effectively allowing them to escalate their access level from standard user to system administrator. The vulnerability is particularly concerning because it leverages legitimate Windows service functionality to achieve privilege escalation, making detection more challenging for security monitoring systems.
From an operational impact perspective, this vulnerability creates significant risks for enterprise environments where multiple users interact with Windows systems. Attackers can exploit this flaw to install malicious software, modify critical system files, access sensitive data, or establish persistent backdoors within the compromised system. The vulnerability affects various Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across modern enterprise infrastructures. Organizations may experience unauthorized access to confidential information, system compromise, and potential lateral movement within their networks as attackers leverage the elevated privileges to explore and infiltrate additional systems.
The vulnerability aligns with CWE-284, which describes improper access control issues, and represents a classic example of how service-based authentication flaws can be exploited for privilege escalation. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques under the T1068 category, specifically targeting the exploitation of service misconfigurations and access control weaknesses. Security professionals should note that the vulnerability can be exploited through various attack vectors including malicious ActiveX controls, web-based attacks, or local exploitation scenarios. The remediation approach requires immediate patch deployment from Microsoft, along with network segmentation and monitoring to detect potential exploitation attempts. Organizations should also implement principle of least privilege configurations and regularly audit ActiveX installer service permissions to minimize the attack surface and prevent unauthorized access to system resources.
This vulnerability demonstrates the critical importance of proper service authentication and access control mechanisms in operating system design. The flaw underscores the need for comprehensive security testing of system services and highlights the potential consequences of insufficient privilege validation in core Windows components. Security teams must remain vigilant in monitoring for exploitation attempts and ensure timely patch management to protect against similar vulnerabilities that may arise from service misconfigurations or access control weaknesses.