CVE-2020-8714 in Server Board
Summary
by MITRE
Improper authentication for some Intel(R) Server Boards, Server Systems and Compute Modules before version 1.59 may allow an authenticated 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-2020-8714 represents a critical weakness in Intel's server infrastructure products that affects boards, systems, and compute modules prior to firmware version 1.59. This issue stems from improper authentication mechanisms that create a pathway for privilege escalation, specifically targeting authenticated users who possess local access to affected systems. The vulnerability exists within Intel's management and configuration interfaces, where inadequate validation of user credentials and access controls allows malicious actors to potentially elevate their privileges from standard user level to administrative access. This flaw demonstrates a fundamental breakdown in the principle of least privilege, where the system fails to properly enforce authorization boundaries that should prevent unauthorized escalation of privileges. The vulnerability is particularly concerning because it requires only local access and authentication, meaning that someone who has already gained access to a system through legitimate means could exploit this weakness to gain broader administrative capabilities.
The technical implementation of this vulnerability involves weaknesses in the firmware authentication subsystem that governs access to system management features and administrative functions. When a user successfully authenticates to the system, the authentication process does not properly validate whether that user should have elevated privileges for specific operations. This authentication bypass occurs at the firmware level where Intel's management engine or similar low-level components handle privilege validation. The flaw typically manifests when attempting to perform administrative actions that require elevated permissions, but the system fails to properly verify the user's authorization level before granting access. According to CWE classification, this vulnerability maps to CWE-287 which describes improper authentication issues, specifically focusing on the inadequate validation of authentication mechanisms. The attack vector is classified as local access since the user must already be authenticated to the system, but the vulnerability allows them to bypass additional authorization checks that should normally prevent privilege escalation.
The operational impact of CVE-2020-8714 extends beyond simple privilege escalation, creating potential for broader system compromise and data breaches within enterprise environments. An authenticated user who exploits this vulnerability can gain access to sensitive system configuration data, modify critical firmware settings, and potentially establish persistent backdoors within the affected infrastructure. This vulnerability affects the core management capabilities of Intel server platforms, which are typically used in data centers, enterprise servers, and cloud computing environments where system integrity and security are paramount. The implications are particularly severe for organizations relying on Intel server infrastructure, as this vulnerability could enable attackers to compromise entire server fleets if multiple systems are running affected firmware versions. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and can be leveraged as part of broader attack chains that involve initial access through legitimate credentials followed by elevation of privileges to gain administrative control. Organizations may experience unauthorized access to system logs, configuration files, and sensitive operational data that should remain protected from unauthorized users.
Mitigation strategies for CVE-2020-8714 primarily focus on firmware updates and enhanced access controls. Intel has released firmware version 1.59 and subsequent updates that address this authentication weakness by strengthening the validation mechanisms for privilege escalation attempts. Organizations should prioritize immediate deployment of these firmware updates across all affected server platforms, particularly in environments where local access controls may be less restrictive. Additional mitigations include implementing strict access control policies that limit local access to administrative functions, enforcing multi-factor authentication for all administrative accounts, and monitoring system logs for unusual privilege escalation attempts. Network segmentation and least privilege principles should be enforced to minimize the potential impact if an attacker successfully exploits this vulnerability. Security teams should also conduct comprehensive audits of their server infrastructure to identify all affected systems and ensure proper patch management procedures are in place. The vulnerability highlights the importance of maintaining current firmware versions and implementing robust security monitoring that can detect anomalous behavior patterns indicating privilege escalation attempts. Organizations should also consider implementing automated patch management solutions to ensure timely deployment of security updates and reduce the window of vulnerability exposure.