CVE-2022-21131 in Xeon
Summary
by MITRE • 05/12/2022
Improper access control for some Intel(R) Xeon(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
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Analysis
by VulDB Data Team • 05/15/2022
The vulnerability identified as CVE-2022-21131 represents a critical access control flaw affecting Intel Xeon processors that could enable authenticated users to gain unauthorized information disclosure through local system access. This issue stems from inadequate privilege enforcement mechanisms within the processor's security architecture, creating potential pathways for malicious actors who already possess legitimate system credentials to escalate their access and extract sensitive data. The vulnerability specifically impacts Intel Xeon processors and demonstrates the ongoing challenges in maintaining robust security boundaries within modern microprocessor designs where hardware-level protections must adequately enforce access controls.
The technical root cause of this vulnerability lies in the improper implementation of access control mechanisms within the processor's memory management and privilege levels. When an authenticated user executes malicious code or exploits existing system access, the processor fails to properly validate the security context of the requesting entity, potentially allowing information disclosure through direct memory access or privilege escalation techniques. This flaw operates at the hardware level where the processor's security features should prevent unauthorized access to sensitive memory regions, but instead allows authenticated users to bypass these protections. The vulnerability typically manifests when legitimate users attempt to access memory areas or system resources that should be restricted based on their privilege level or security domain.
From an operational perspective, this vulnerability presents significant risks to enterprise environments where Intel Xeon processors are deployed, particularly in data centers, cloud infrastructure, and high-performance computing environments. The impact extends beyond simple information disclosure to potentially enable more sophisticated attacks such as privilege escalation, lateral movement, and data exfiltration. Organizations using affected processors may experience unauthorized access to sensitive system information, including memory contents, cryptographic keys, or other confidential data that should remain protected. The local access requirement means that attackers must first establish a foothold within the system, but once achieved, they can leverage this vulnerability to extract information that would normally be protected by the processor's security architecture.
Security professionals should implement immediate mitigations including firmware updates from Intel, system hardening measures, and enhanced monitoring of system access patterns. The vulnerability aligns with CWE-284, which addresses improper access control, and may be relevant to ATT&CK techniques involving privilege escalation and credential access. Organizations should conduct thorough risk assessments to identify systems running affected Intel Xeon processors and implement layered security controls including network segmentation, access control reviews, and continuous monitoring of system behavior for signs of exploitation attempts. Additionally, system administrators should consider implementing additional security measures such as memory protection schemes, regular security audits, and comprehensive incident response procedures to address potential exploitation of this vulnerability. The remediation process should include comprehensive testing of firmware updates to ensure compatibility and stability while addressing the access control weakness that enables information disclosure.