CVE-2020-8745 in CSME
Summary
by MITRE • 11/12/2020
Insufficient control flow management in subsystem for Intel(R) CSME versions before 11.8.80, 11.12.80, 11.22.80, 12.0.70, 13.0.40, 13.30.10, 14.0.45 and 14.5.25 , Intel(R) TXE versions before 3.1.80 and 4.0.30 may allow an unauthenticated user to potentially enable escalation of privilege via physical access.
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Analysis
by VulDB Data Team • 03/28/2025
The vulnerability identified as CVE-2020-8745 represents a critical weakness in Intel's Converged Security and Management Engine (CSME) and Trusted Execution Engine (TXE) subsystems that affects multiple generations of Intel processors. This flaw stems from insufficient control flow management within the firmware components that govern security-sensitive operations. The vulnerability specifically targets versions of CSME prior to 11.8.80, 11.12.80, 11.22.80, 12.0.70, 13.0.40, 13.30.10, 14.0.45, and 14.5.25, as well as TXE versions before 3.1.80 and 4.0.30, creating a widespread impact across numerous hardware platforms that rely on Intel's embedded security subsystems. The vulnerability classification aligns with CWE-252, which addresses insufficient control flow management, and represents a significant concern for enterprise security infrastructure.
The technical nature of this vulnerability involves weaknesses in the control flow mechanisms that govern how security-sensitive operations are executed within the CSME and TXE environments. These subsystems operate at a low level within the processor architecture and handle critical security functions including secure boot processes, cryptographic operations, and hardware-based security policies. When control flow management is insufficient, it creates potential pathways for attackers to manipulate the execution flow of security-critical code, potentially allowing unauthorized privilege escalation. The vulnerability requires physical access to exploit, which limits its attack surface but does not eliminate the risk, particularly in environments where physical security controls may be inadequate.
The operational impact of CVE-2020-8745 extends beyond simple privilege escalation to potentially compromise the entire security posture of affected systems. Since CSME and TXE operate at a level below the operating system and maintain their own isolated execution environments, successful exploitation could allow attackers to bypass traditional operating system security controls and gain access to sensitive cryptographic keys, system configuration data, and other security-critical information. This vulnerability particularly affects enterprise servers, workstations, and embedded systems that rely on Intel's firmware security components for maintaining system integrity. The implications are significant for organizations that depend on hardware-level security assurances, as the compromised subsystem could undermine the trust model that these platforms are designed to provide.
Mitigation strategies for CVE-2020-8745 primarily involve updating firmware components to the patched versions released by Intel, which address the control flow management issues in the affected subsystems. Organizations should prioritize updating their hardware to versions that include the necessary firmware patches, particularly those that address the specific CSME and TXE versions mentioned in the vulnerability description. Additionally, implementing robust physical security controls becomes critical since the vulnerability requires physical access to exploit, but this does not eliminate the need for comprehensive security management. System administrators should also consider monitoring for unusual activity patterns that might indicate exploitation attempts, and implementing hardware-based security features such as Intel's Platform Trust Technology and Secure Boot mechanisms to provide additional layers of protection. The vulnerability highlights the importance of maintaining current firmware versions and implementing comprehensive security management practices across all hardware components that rely on Intel's embedded security subsystems.