CVE-2022-21904 in Windows
Summary
by MITRE • 01/12/2022
Windows GDI Information Disclosure Vulnerability.
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Analysis
by VulDB Data Team • 11/15/2024
The Windows GDI information disclosure vulnerability identified as CVE-2022-21904 represents a critical security flaw within the Graphics Device Interface component of Microsoft Windows operating systems. This vulnerability resides in the kernel-mode drivers responsible for handling graphics operations and can potentially allow unauthorized information disclosure when processing specially crafted graphics commands. The flaw affects multiple Windows versions including Windows 10, Windows 11, and Windows Server 2019 and 2022, making it a widespread concern for enterprise environments. The vulnerability manifests when the GDI subsystem fails to properly validate input parameters during graphics processing operations, creating opportunities for information leakage through memory corruption patterns.
The technical implementation of this vulnerability stems from inadequate bounds checking within the Windows GDI driver code, specifically in how it handles certain graphics object parameters and memory allocations. When a malicious application or attacker submits malformed graphics commands to the GDI subsystem, the system fails to properly validate the input data before processing it, leading to potential information disclosure through memory reads that should not be permitted. This type of vulnerability falls under the Common Weakness Enumeration category CWE-125, which describes out-of-bounds read conditions, and also relates to CWE-200 which covers exposure of sensitive information. The flaw operates at the kernel level, making it particularly dangerous as it can potentially be exploited to extract sensitive data from system memory, including credentials, encryption keys, or other confidential information that should remain protected.
The operational impact of CVE-2022-21904 extends beyond simple information disclosure, as it creates potential pathways for more sophisticated attacks within the Windows environment. Attackers could leverage this vulnerability to gain insights into system memory layouts, potentially enabling them to craft more effective exploitation techniques for other vulnerabilities or to bypass security controls such as address space layout randomization. The vulnerability's presence in the core graphics subsystem means that it could be triggered through various attack vectors including web browsing, document processing, or even legitimate software applications that utilize graphics rendering capabilities. Organizations running affected systems face increased risk of data breaches, privilege escalation attempts, and potential lateral movement within their networks, as the leaked information could provide attackers with critical details about system internals and security configurations.
Mitigation strategies for CVE-2022-21904 primarily focus on applying Microsoft's security patches and updates as soon as they become available, as the vendor has released patches through the regular monthly security update cycle. System administrators should prioritize deployment of these patches across all affected Windows systems, particularly those in critical infrastructure environments. Additional defensive measures include implementing application whitelisting policies to restrict execution of untrusted graphics processing applications, monitoring for unusual graphics-related system calls, and employing memory protection mechanisms such as data execution prevention and heap spraying detection. Network segmentation and privilege separation can also help limit the potential impact if exploitation occurs. Organizations should also consider implementing security monitoring solutions that can detect anomalous behavior patterns consistent with information disclosure attempts, as the vulnerability may be exploited as part of a broader attack campaign rather than standalone exploitation. The vulnerability's classification under the ATT&CK framework includes techniques related to credential access and privilege escalation, making comprehensive security monitoring essential for early detection and response.