CVE-2020-8712 in Server Board
Summary
by MITRE
Buffer overflow in a verification process for some Intel(R) Server Boards, Server Systems and Compute Modules before version 2.45 may allow an authenticated user to potentially enable escalation of privilege via local access.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 11/09/2020
The vulnerability identified as CVE-2020-8712 represents a critical buffer overflow flaw within the verification process of Intel server hardware components including server boards, systems, and compute modules. This security weakness affects firmware versions prior to 2.45 and demonstrates a significant oversight in input validation mechanisms that could be exploited by malicious actors with local access privileges. The vulnerability resides in the firmware verification process where insufficient bounds checking allows attackers to manipulate memory structures through carefully crafted inputs.
The technical implementation of this buffer overflow stems from inadequate memory management within the firmware validation routines that handle authentication and system verification processes. When an authenticated user accesses the system locally, they can potentially trigger the overflow condition by providing malformed input data that exceeds the allocated buffer space. This flaw directly maps to CWE-121 which describes stack-based buffer overflow conditions, and potentially CWE-122 which addresses heap-based buffer overflows where insufficient bounds checking allows memory corruption. The vulnerability creates a pathway for privilege escalation because the verification process typically operates with elevated privileges necessary for system integrity checks, making successful exploitation particularly dangerous.
Operational impact of this vulnerability extends beyond simple local privilege escalation as it provides attackers with the capability to gain elevated system privileges without requiring external network access or complex attack vectors. The authenticated local access requirement means that adversaries must first obtain legitimate user credentials or physical access to the system, but once achieved, they can leverage this flaw to execute arbitrary code with administrative privileges. This represents a significant risk for enterprise environments where server systems are critical infrastructure components, potentially allowing attackers to compromise entire server farms or data centers. The vulnerability also aligns with ATT&CK technique T1068 which describes local privilege escalation techniques, and T1547 which covers registry run keys and startup folder modifications that could be leveraged post-exploitation.
Mitigation strategies for CVE-2020-8712 primarily focus on firmware updates and system hardening measures. Organizations should immediately update affected Intel server boards, systems, and compute modules to firmware version 2.45 or later to address the buffer overflow conditions. Additionally, implementing strict access controls and monitoring for unusual authentication patterns can help detect potential exploitation attempts. Network segmentation and least privilege principles should be enforced to limit the potential impact of successful exploitation, while regular security assessments of firmware components can identify similar vulnerabilities in other system components. The vulnerability demonstrates the importance of robust input validation in firmware environments and highlights the need for continuous security testing of embedded systems that operate with elevated privileges.