CVE-2022-34849 in Xe MAX Driver
Summary
by MITRE • 02/16/2023
Uncaught exception in the Intel(R) Iris(R) Xe MAX drivers for Windows before version 100.0.5.1436(v2) may allow a privileged user to potentially enable denial of service via local access.
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Analysis
by VulDB Data Team • 02/17/2023
The vulnerability identified as CVE-2022-34849 represents a critical flaw in Intel's Iris Xe MAX graphics drivers for Windows operating systems. This issue manifests as an uncaught exception within the driver software, specifically affecting versions prior to 100.0.5.1436(v2). The flaw exists at the kernel level of the graphics driver stack, where proper exception handling mechanisms are absent or inadequately implemented. When certain malicious or malformed inputs are processed by the graphics subsystem, the driver fails to gracefully handle these conditions, resulting in abrupt termination of the graphics service. This behavior creates a potential denial of service condition that can be exploited by local privileged users who have the ability to interact with the graphics subsystem.
The technical nature of this vulnerability aligns with CWE-457, which describes the use of uninitialized variables or improper exception handling in software systems. The root cause stems from inadequate error management within the driver's memory management and graphics processing routines. When the driver encounters unexpected input parameters or malformed graphics commands, it fails to implement proper exception recovery mechanisms, leading to process termination and system instability. The vulnerability specifically impacts the Windows graphics driver model where the iris_xe_max.sys driver component fails to validate input parameters before processing them, creating a path for privilege escalation and system disruption.
From an operational perspective, this vulnerability poses significant risk to enterprise environments where privileged users may have elevated access rights. The local access requirement means that an attacker must already possess user-level credentials or have the ability to execute code with elevated privileges within the system. However, the potential impact extends beyond simple denial of service, as the driver crash can cause system instability and may provide a foothold for further exploitation. The vulnerability can be leveraged to disrupt graphics functionality, potentially affecting applications that depend on GPU acceleration, and could serve as a vector for more sophisticated attacks targeting the graphics subsystem. This type of vulnerability also aligns with ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation' and can be used to establish persistence or escalate privileges within the system.
The mitigation strategy for this vulnerability primarily involves immediate deployment of the patched driver version 100.0.5.1436(v2) or later from Intel's official distribution channels. System administrators should implement comprehensive patch management protocols to ensure all affected systems receive updates promptly. Additional protective measures include implementing least privilege principles to limit user access to graphics processing functions, monitoring system logs for unusual graphics driver behavior, and establishing intrusion detection systems that can identify potential exploitation attempts. Organizations should also consider implementing application whitelisting policies that restrict execution of unauthorized graphics-related processes and maintain regular vulnerability assessments to identify similar issues within their graphics driver stacks. The vulnerability demonstrates the critical importance of robust exception handling in kernel-mode drivers and highlights the need for comprehensive security testing of graphics subsystem components before deployment in production environments.