CVE-2018-12188 in CSME
Summary
by MITRE
Insufficient input validation in Intel CSME before versions 11.8.60, 11.11.60, 11.22.60 or 12.0.20 or Intel TXE before version 3.1.60 or 4.0.10 may allow an unauthenticated user to potentially modify data via physical access.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 05/16/2020
The vulnerability identified as CVE-2018-12188 represents a critical flaw in Intel's Converged Security Management Engine (CSME) and Trusted Execution Engine (TXE) implementations that affects multiple generations of Intel processors. This weakness stems from inadequate input validation mechanisms within the firmware components responsible for security operations, creating potential attack vectors that could be exploited by adversaries with physical access to affected systems. The vulnerability impacts a wide range of Intel processor families including those utilizing CSME versions prior to 11.8.60, 11.11.60, 11.22.60, and 12.0.20, as well as TXE versions before 3.1.60 and 4.0.10, making it particularly concerning for enterprise environments where physical security controls may be insufficient.
The technical nature of this vulnerability falls under CWE-20, which describes "Improper Input Validation," specifically manifesting in the failure to properly validate input parameters within the firmware interfaces of Intel's security subsystems. Attackers with physical access can potentially exploit this weakness to manipulate data within the CSME or TXE environments, effectively bypassing security controls that are typically enforced at the hardware level. The flaw allows for unauthenticated modifications to critical system data, which could result in complete compromise of the security architecture that these subsystems are designed to protect. This type of vulnerability represents a fundamental failure in the security model where the integrity of firmware interfaces is not properly maintained, enabling malicious actors to inject or modify data without proper authentication mechanisms.
The operational impact of CVE-2018-12188 extends beyond simple data modification capabilities and represents a significant threat to system integrity and confidentiality. When exploited, this vulnerability could enable attackers to manipulate firmware-level security controls, potentially leading to persistent backdoors, unauthorized privilege escalation, or complete system compromise. The requirement for physical access does not diminish the severity of this flaw, as physical access often represents a critical attack surface that is difficult to monitor and control in enterprise environments. Organizations with legacy systems or those that have not updated their firmware to the patched versions remain particularly vulnerable, as these systems may be deployed in locations where physical security is not adequately maintained, such as data centers, server rooms, or endpoint devices.
Mitigation strategies for CVE-2018-12188 must focus on both immediate remediation and long-term security architecture improvements. The primary and most effective mitigation involves updating to the patched versions of Intel CSME and TXE firmware as released by Intel, specifically targeting versions 11.8.60, 11.11.60, 11.22.60, 12.0.20 for CSME and 3.1.60 and 4.0.10 for TXE. Organizations should also implement robust physical security measures including restricted access to server and network equipment, proper environmental controls, and monitoring systems to detect unauthorized physical access attempts. The vulnerability aligns with ATT&CK technique T1068, which describes "Exploitation for Privilege Escalation," and T1496, which covers "Resource Hijacking," as attackers could leverage this weakness to gain elevated privileges or compromise system resources. Additionally, organizations should consider implementing firmware integrity monitoring solutions and regular security assessments of their hardware security components to detect potential exploitation attempts and maintain overall system security posture.