CVE-2018-12204 in Server Board
Summary
by MITRE
Privilege escalation vulnerability in Platform Sample/ Silicon Reference firmware Intel(R) Server Board, Intel(R) Server System and Intel(R) Compute Module may allow privileged user to potentially execute arbitrary code via local access.
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Analysis
by VulDB Data Team • 05/16/2020
This privilege escalation vulnerability exists within the firmware components of Intel's server platforms including the Platform Sample/Silicon Reference firmware implementations across Server Boards, Server Systems, and Compute Modules. The flaw allows a locally authenticated privileged user to potentially execute arbitrary code, representing a significant security risk in enterprise and data center environments where firmware integrity is critical for overall system security posture. The vulnerability stems from insufficient privilege validation mechanisms within the firmware's execution pathways, creating an attack surface that can be exploited by users who already possess local access privileges but lack the elevated permissions required for malicious code execution.
The technical implementation of this vulnerability involves improper handling of privilege levels during firmware operations, where the system fails to adequately verify the privilege context of executing code paths. This flaw typically manifests when a privileged user attempts to leverage existing system access to escalate their privileges beyond normal operational boundaries. The vulnerability is classified as a privilege escalation issue that can be categorized under CWE-269: "Improper Privilege Management" and may also align with CWE-787: "Out-of-bounds Write" if the exploitation involves buffer manipulation during privilege elevation attempts. The attack vector requires local access to the system, meaning the attacker must already have some level of authenticated presence on the target platform, which reduces the attack surface but does not eliminate the risk entirely.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can enable attackers to bypass firmware security controls that are designed to prevent unauthorized modifications to critical system components. This capability allows for potential firmware modification, rootkit installation, and complete system compromise that can persist across reboots since firmware-level attacks are typically not cleared by conventional operating system restarts. The vulnerability affects Intel's server infrastructure products where firmware security is paramount for maintaining trust in the system's integrity. Attackers could potentially use this vulnerability to establish persistent backdoors, modify system configurations, or gain access to sensitive data stored within the server environment. The implications are particularly severe in data center environments where multiple virtual machines may be hosted on compromised physical hardware, potentially leading to cross-tenant data breaches and service disruptions.
Mitigation strategies for this vulnerability should include immediate firmware updates from Intel to address the privilege escalation flaw, along with implementation of comprehensive system monitoring to detect unusual privilege elevation attempts. Organizations should also consider implementing firmware integrity checking mechanisms and ensuring that only authorized personnel have local access to server systems. The mitigation approach should align with ATT&CK framework's T1068: "Exploitation for Privilege Escalation" and T1014: "Rootkit" techniques, as these methods are commonly employed when exploiting similar firmware-level vulnerabilities. Additional security controls such as secure boot enforcement, firmware access restrictions, and regular security assessments of server firmware configurations should be implemented to reduce the attack surface and prevent exploitation. System administrators must also maintain detailed audit logs of privilege-related activities and establish incident response procedures specifically designed for firmware-level security incidents.