CVE-2020-8722 in Server Board
Summary
by MITRE
Buffer overflow in a subsystem for some Intel(R) Server Boards, Server Systems and Compute Modules before version 1.59 may allow a privileged user to potentially enable escalation of privilege via local access.
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Analysis
by VulDB Data Team • 11/09/2020
This vulnerability represents a critical buffer overflow condition affecting Intel server hardware platforms including specific server boards, systems, and compute modules. The flaw exists within a subsystem component that governs low-level hardware operations and system management functions. A privileged user with local access to the affected hardware can exploit this vulnerability to execute arbitrary code with elevated privileges, potentially leading to complete system compromise and privilege escalation. The vulnerability stems from improper bounds checking in memory allocation routines where input data exceeds allocated buffer space, creating opportunities for memory corruption and code execution.
The technical implementation of this buffer overflow occurs within the firmware or BIOS subsystem of Intel server platforms, specifically targeting components responsible for system configuration and hardware management. Attackers can leverage this weakness by crafting malicious input that overflows predetermined buffer boundaries, potentially overwriting critical system memory locations including return addresses, function pointers, or privilege level indicators. This type of vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and may also manifest characteristics consistent with CWE-787, representing out-of-bounds write conditions. The attack vector requires local physical or administrative access, making it a privilege escalation vulnerability rather than a remote exploit, though the implications for system security remain severe.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential complete system compromise and persistent backdoor capabilities. Once exploited, the malicious code can establish persistent access, modify system firmware, or manipulate hardware configuration settings that could persist across reboots. This vulnerability affects Intel server platforms that were shipped with firmware versions prior to 1.59, creating a significant attack surface for organizations running legacy server infrastructure. The threat landscape for this vulnerability includes both insider threats from malicious privileged users and potential external attackers who have gained local administrative access through other means. According to ATT&CK framework, this vulnerability maps to privilege escalation techniques and specifically relates to T1068, which covers local privilege escalation through exploitation of system vulnerabilities.
Mitigation strategies for this vulnerability require immediate firmware updates to version 1.59 or later, which contain patches addressing the buffer overflow conditions. System administrators should conduct comprehensive inventory assessments to identify all affected server platforms and prioritize patch deployment across critical infrastructure. Additional protective measures include implementing strict access controls, monitoring for unauthorized local access attempts, and establishing robust firmware integrity verification processes. Organizations should also consider network segmentation and privilege minimization practices to limit the potential impact of successful exploitation attempts. Regular firmware update policies and vulnerability scanning procedures should be implemented to maintain ongoing protection against similar vulnerabilities in the future. The remediation process must account for potential firmware update compatibility issues and ensure proper rollback procedures are available in case of update failures.