CVE-2023-48366: Intel Firmware Privilege Escalation Flaw

CVE-2023-48366 Overview

A race condition vulnerability has been identified in Intel System Security Report and System Resources Defense firmware. This firmware-level security flaw may allow a privileged user to potentially enable information disclosure through local access. The vulnerability stems from improper synchronization mechanisms that can be exploited under specific timing conditions.

Critical Impact

A privileged attacker with local access could exploit this race condition to access sensitive information that should otherwise be protected by the firmware's security mechanisms.

Affected Products

• Intel System Security Report firmware
• Intel System Resources Defense firmware

Discovery Timeline

• 2025-02-12 - CVE CVE-2023-48366 published to NVD
• 2025-02-12 - Last updated in NVD database

Technical Details for CVE-2023-48366

Vulnerability Analysis

This vulnerability is classified under CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization), commonly known as a race condition. The flaw exists within Intel's firmware components responsible for system security reporting and resource defense mechanisms.

Race conditions in firmware are particularly concerning because they operate at a privileged level below the operating system. When proper synchronization is not enforced during concurrent operations, a window of opportunity emerges where an attacker can manipulate or intercept data during state transitions. In this case, the race condition enables information disclosure, meaning sensitive data managed by the firmware could be exposed to unauthorized parties.

The local attack vector requirement and the need for high privileges significantly reduces the attack surface, as exploitation requires the attacker to already have administrative or elevated access to the target system. However, in scenarios where an attacker has established local persistence, this vulnerability could be leveraged to extract additional sensitive information.

Root Cause

The root cause of this vulnerability lies in improper synchronization of concurrent execution paths within the Intel System Security Report and System Resources Defense firmware. When multiple processes or threads access shared resources without adequate locking mechanisms or atomic operations, a time-of-check to time-of-use (TOCTOU) window can emerge. This allows an attacker to manipulate the state of shared resources between the security check and the actual use of the resource.

Attack Vector

Exploitation of this vulnerability requires local access to the affected system along with elevated privileges. An attacker would need to:

1. Gain authenticated local access to a system running vulnerable Intel firmware
2. Identify the timing window during which the race condition can be triggered
3. Execute carefully timed operations to exploit the synchronization gap
4. Capture or redirect the disclosed information during the vulnerable window

The technical complexity of exploiting race conditions typically requires precise timing and potentially multiple attempts, but successful exploitation can result in disclosure of confidential system security information.

Due to the firmware-level nature of this vulnerability and the absence of verified proof-of-concept code, specific exploitation details are not publicly available. Refer to the Intel Security Advisory SA-01203 for additional technical details.

Detection Methods for CVE-2023-48366

Indicators of Compromise

• Unusual firmware access patterns or repeated firmware read operations from privileged processes
• Anomalous timing in firmware-related system calls that may indicate race condition exploitation attempts
• Unexpected information disclosure events logged by system security monitoring tools

Detection Strategies

• Monitor for abnormal privileged user activity on systems with Intel System Security Report or System Resources Defense firmware
• Implement integrity monitoring for firmware components to detect unauthorized access or modification attempts
• Deploy endpoint detection solutions capable of monitoring firmware-level interactions and identifying suspicious timing patterns

Monitoring Recommendations

• Enable verbose logging for firmware update and access operations on affected Intel platforms
• Utilize SentinelOne's behavioral AI to detect anomalous local privilege operations that may precede exploitation
• Regularly audit privileged user accounts and their activities on systems running vulnerable firmware versions

How to Mitigate CVE-2023-48366

Immediate Actions Required

• Review the Intel Security Advisory SA-01203 for official guidance and affected firmware versions
• Identify all systems in your environment running Intel System Security Report or System Resources Defense firmware
• Prioritize patching systems where privileged users have broader access or where sensitive data is processed
• Restrict local privileged access to affected systems until firmware updates can be applied

Patch Information

Intel has released security guidance addressing this vulnerability in Security Advisory SA-01203. Organizations should consult this advisory for specific firmware update versions and installation procedures. Contact your hardware vendor or OEM for the appropriate firmware update package for your specific system configuration.

Workarounds

• Implement strict least-privilege access controls to minimize the number of users with elevated privileges on affected systems
• Enhance monitoring and auditing of privileged user activities to detect potential exploitation attempts
• Consider network segmentation to isolate systems with vulnerable firmware from untrusted network segments
• Deploy SentinelOne Singularity platform for comprehensive endpoint protection and behavioral monitoring capabilities