CVE-2022-23290 in Windows
Summary
by MITRE • 03/09/2022
Windows Inking COM Elevation of Privilege Vulnerability.
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Analysis
by VulDB Data Team • 03/11/2022
The Windows Inking COM Elevation of Privilege Vulnerability represents a critical security flaw within the Windows operating system that allows attackers to escalate their privileges from standard user level to system level through a component known as the Inking service. This vulnerability specifically affects the Component Object Model (COM) interface used by the Windows Inking functionality, which enables touch and stylus-based input processing. The flaw resides in how the system handles COM object instantiation and privilege management within the inking subsystem, creating a pathway for malicious code execution with elevated privileges.
The technical implementation of this vulnerability stems from improper access control mechanisms within the Windows Inking COM interface. When a user interacts with inking functionality, the system creates COM objects that should operate with restricted privileges but instead maintain elevated access rights. This occurs due to insufficient validation of the calling process identity and lack of proper privilege separation in the COM object creation process. Attackers can exploit this by crafting malicious COM objects or manipulating existing inking processes to execute arbitrary code with system-level privileges, bypassing normal security boundaries that should prevent such escalation.
The operational impact of CVE-2022-23290 extends beyond simple privilege escalation, as it provides adversaries with a powerful attack vector that can be leveraged for persistent system compromise. Once an attacker achieves system-level privileges through this vulnerability, they can modify critical system files, install rootkits, establish backdoors, and exfiltrate sensitive data without detection. The vulnerability is particularly concerning because it operates within legitimate Windows services, making it difficult to distinguish between benign and malicious activity. This characteristic aligns with ATT&CK technique T1068 which describes privilege escalation through legitimate credentials and system services, and CWE-276 which addresses improper privilege management in software components.
Mitigation strategies for this vulnerability require immediate patch deployment from Microsoft as the primary solution, given that the flaw exists within core Windows operating system components. System administrators should also implement additional defensive measures including restricted COM access controls, monitoring for unusual inking service behavior, and employing application whitelisting policies to prevent unauthorized COM object instantiation. The vulnerability demonstrates the importance of proper privilege separation in system services and highlights the need for comprehensive security reviews of COM interfaces, particularly those that handle user input processing. Organizations should also consider implementing behavioral monitoring solutions that can detect anomalous COM object creation patterns and privilege escalation attempts, as these techniques align with ATT&CK's T1059 and T1070 detection methods for identifying malicious code execution and privilege escalation activities within enterprise environments.