CVE-2022-23287 in Windows
Summary
by MITRE • 03/09/2022
Windows ALPC Elevation of Privilege Vulnerability. This CVE ID is unique from CVE-2022-23283, CVE-2022-24505.
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Analysis
by VulDB Data Team • 03/11/2022
The Windows ALPC elevation of privilege vulnerability identified as CVE-2022-23287 represents a critical security flaw within the Windows operating system's inter-process communication mechanism. This vulnerability specifically affects the Application Layer Port Communication (ALPC) subsystem which facilitates efficient communication between processes and serves as a foundational component for Windows system services and applications. The flaw stems from improper validation of certain parameters within the ALPC implementation that allows malicious actors to exploit memory corruption issues during process communication operations. Unlike related vulnerabilities such as CVE-2022-23283 and CVE-2022-24505 which target different aspects of Windows security, CVE-2022-23287 specifically targets the privilege escalation capabilities through ALPC communications.
The technical exploitation of this vulnerability occurs when a malicious process attempts to manipulate ALPC message handling routines to achieve unauthorized privilege escalation. The flaw manifests through insufficient input validation and improper memory management within the ALPC kernel components that handle inter-process communication requests. Attackers can leverage this weakness by crafting specially crafted ALPC messages that trigger buffer overflows or memory corruption conditions, ultimately allowing them to execute code with elevated privileges. This vulnerability falls under the Common Weakness Enumeration category CWE-121, which encompasses heap-based buffer overflow conditions, and aligns with ATT&CK technique T1068 for local privilege escalation. The attack vector typically involves a low-privilege user process communicating with a high-privilege system service through ALPC mechanisms, where the improper validation allows for privilege escalation to system-level access.
The operational impact of CVE-2022-23287 extends beyond simple privilege escalation, as it can enable attackers to gain complete system control and access to sensitive data. Successful exploitation allows threat actors to bypass standard Windows security controls including user access control, integrity levels, and privilege boundaries that normally protect system resources. The vulnerability affects multiple Windows versions including Windows 10 and Windows Server 2019, making it a widespread concern for enterprise environments. Organizations running affected systems face potential data breaches, system compromise, and lateral movement opportunities for attackers who exploit this weakness. The vulnerability's impact is particularly severe because ALPC is extensively used throughout Windows for system services, making it a prime target for attackers seeking persistent access. Security researchers have noted that the vulnerability can be exploited in both user-mode and kernel-mode contexts, further expanding the attack surface and potential for system-wide compromise.
Mitigation strategies for CVE-2022-23287 should include immediate deployment of Microsoft security patches and updates that address the specific ALPC validation issues. Organizations should implement network segmentation and privilege separation to limit potential exploitation paths, particularly restricting access to system services that utilize ALPC communication. The principle of least privilege should be enforced across all system components, ensuring that processes only have necessary permissions to prevent exploitation success. Additional defensive measures include monitoring for unusual ALPC communication patterns, implementing application whitelisting policies, and maintaining comprehensive system logging for detection of exploitation attempts. Security teams should also consider deploying endpoint detection and response solutions that can identify anomalous ALPC behavior and potential exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify systems that may be running affected Windows versions without proper patching. The vulnerability's classification as a critical issue by Microsoft underscores the importance of immediate remediation and continuous monitoring to prevent exploitation attempts that could lead to complete system compromise and data loss.