CVE-2020-8719 in Server Board
Summary
by MITRE
Buffer overflow in 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
The vulnerability identified as CVE-2020-8719 represents a critical buffer overflow flaw within the subsystem of certain Intel server boards, systems, and compute modules. This issue affects firmware versions prior to 1.59 and demonstrates a significant security weakness that could be exploited by malicious actors with local access privileges. The buffer overflow occurs within the firmware subsystem responsible for managing system operations and configurations, creating potential entry points for privilege escalation attacks.
The technical nature of this vulnerability stems from improper bounds checking within the firmware code that handles buffer operations. When processing certain input data or commands, the system fails to validate the size of incoming data against predetermined buffer limits, allowing attackers to overwrite adjacent memory locations. This flaw falls under the CWE-121 category of buffer overflow conditions, specifically manifesting as a stack-based buffer overflow that can corrupt program execution flow. The vulnerability is particularly dangerous because it requires only local access privileges to exploit, meaning an attacker who has already gained system access or physical presence can leverage this weakness to elevate their privileges to higher system levels.
The operational impact of CVE-2020-8719 extends beyond simple privilege escalation, as it can potentially allow attackers to gain root access to the system firmware itself. This level of access enables comprehensive system compromise including the ability to modify boot processes, install persistent backdoors, and access sensitive system information. The attack surface is particularly concerning for enterprise environments where these Intel server platforms are commonly deployed, as the vulnerability could be exploited to establish long-term footholds within critical infrastructure. The local access requirement means that physical security measures become crucial, as attackers with access to the system can exploit this vulnerability without requiring network-based attacks or complex remote exploitation techniques.
Mitigation strategies for this vulnerability primarily focus on firmware updates and system hardening measures. Organizations must immediately upgrade all affected Intel server boards, systems, and compute modules to firmware version 1.59 or later to address the buffer overflow condition. Additionally, implementing strict access controls and monitoring for unusual system behavior can help detect potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1068 which covers 'Local Privilege Escalation' and T1543 which addresses 'Create or Modify System Process'. Network segmentation and privileged access management controls should be strengthened to minimize potential damage from successful exploitation attempts. Regular firmware auditing and vulnerability assessments should be implemented as part of ongoing security operations to prevent similar issues from arising in the future.