CVE-2020-8732 in Server Board
Summary
by MITRE
Heap-based buffer overflow in the firmware for some Intel(R) Server Boards, Server Systems and Compute Modules before version 1.59 may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access.
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Analysis
by VulDB Data Team • 11/09/2020
This vulnerability represents a critical heap-based buffer overflow affecting Intel server hardware firmware versions prior to 1.59. The flaw exists within the firmware implementation of Intel server boards, systems, and compute modules, creating a potential pathway for privilege escalation attacks. The vulnerability specifically targets the heap memory management within the firmware code, where insufficient bounds checking allows malicious data to overwrite adjacent memory regions. This type of vulnerability falls under the common weakness enumeration CWE-121, which categorizes heap-based buffer overflows as a fundamental memory safety issue. The attack vector requires adjacent network access, meaning an attacker must be physically present or connected to the same network segment as the target system, but does not require authentication credentials. This adjacency requirement significantly reduces the attack surface compared to remotely exploitable vulnerabilities, yet still poses a serious threat in environments where physical access control is insufficient or compromised.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it could potentially enable attackers to execute arbitrary code within the firmware context, effectively compromising the system's integrity at the lowest level. Firmware-level attacks are particularly dangerous because they operate below the operating system layer, making detection and remediation significantly more challenging. The vulnerability could allow an attacker to modify critical system parameters, install persistent backdoors, or manipulate the system's boot process to maintain long-term access. According to ATT&CK framework, this represents a technique categorized under privilege escalation and persistence mechanisms, specifically targeting firmware integrity. The exploitation of such vulnerabilities often leads to complete system compromise, as firmware-level access provides attackers with unprecedented control over the hardware operations and system behavior.
Mitigation strategies for CVE-2020-8732 primarily focus on firmware updates and access control measures. Organizations should immediately deploy firmware version 1.59 or later, which includes patches addressing the heap buffer overflow conditions. System administrators must also implement strict physical access controls and network segmentation to limit adjacent access opportunities. Network monitoring should be enhanced to detect unusual firmware communication patterns or unauthorized access attempts. The vulnerability highlights the importance of firmware security practices and the need for regular security assessments of embedded systems. Additional protective measures include implementing firmware integrity verification mechanisms and maintaining detailed inventory records of all hardware components with their respective firmware versions. Security teams should also consider conducting penetration testing focused on firmware-level attacks to identify similar vulnerabilities in other system components and ensure comprehensive protection against advanced persistent threats targeting hardware infrastructure.