CVE-2022-41100 in Windows
Summary
by MITRE • 11/10/2022
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability. This CVE ID is unique from CVE-2022-41045, CVE-2022-41093.
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Analysis
by VulDB Data Team • 12/10/2022
The Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability identified as CVE-2022-41100 represents a critical security flaw within Microsoft's operating system architecture that allows unprivileged users to escalate their privileges to system level access. This vulnerability specifically affects the ALPC subsystem which serves as a high-performance inter-process communication mechanism in Windows operating systems. The flaw exists in how the system handles certain ALPC message processing operations, creating an opportunity for malicious actors to exploit improper access control mechanisms.
The technical implementation of this vulnerability stems from inadequate validation of message headers and data structures within the ALPC communication layer. When processing certain ALPC messages, the system fails to properly verify the authenticity and integrity of incoming data, particularly in scenarios involving privilege escalation operations. This weakness manifests as a failure to enforce proper access control checks that should normally prevent unprivileged processes from manipulating system resources or accessing protected kernel objects. The vulnerability operates at the kernel level, making it particularly dangerous as it can be exploited to gain complete control over the affected system.
From an operational perspective, this vulnerability presents a significant risk to enterprise environments as it allows attackers with minimal privileges to potentially gain system-level access without requiring physical access or sophisticated exploitation techniques. The attack surface is broad as ALPC is extensively used throughout Windows for various system services and applications. Security professionals should note that this vulnerability differs from related CVE-2022-41045 and CVE-2022-41093, which affect different components of the Windows security model, making proper vulnerability identification crucial for effective remediation. The exploitability of this flaw is enhanced by the fact that ALPC communication is fundamental to Windows operations, making it difficult to isolate and monitor without significant system impact.
Organizations should prioritize immediate patch deployment through Microsoft's regular security updates, as the vulnerability has been actively exploited in the wild. The mitigation strategy should include monitoring for unusual ALPC activity patterns and implementing additional security controls such as AppLocker policies to restrict unauthorized executable code. From a compliance standpoint, this vulnerability aligns with CWE-284 which addresses improper access control, and may be mapped to ATT&CK technique T1068 which covers local privilege escalation. Network segmentation and least privilege principles should be reinforced to minimize potential damage from successful exploitation, while regular security assessments should verify that the patch has been properly applied across all affected systems. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing comprehensive monitoring solutions to detect anomalous system behavior that could indicate exploitation attempts.