CVE-2020-8723 in Server Board
Summary
by MITRE
Cross-site scripting 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.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 11/09/2020
This vulnerability affects Intel server boards, server systems, and compute modules with firmware versions prior to 1.59, representing a cross-site scripting flaw that could potentially enable privilege escalation. The vulnerability exists within the web-based management interface of these devices, which is accessible through adjacent network access. The flaw allows an unauthenticated attacker who has physical or network proximity to the affected hardware to inject malicious scripts into the web interface, potentially compromising the system's security posture. This issue falls under the CWE-79 category for cross-site scripting, specifically manifesting as a server-side vulnerability that could be exploited by an attacker with adjacent access to the target system.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the web management interface of Intel's server hardware. When the system processes user input through web forms or URL parameters, it fails to properly sanitize or encode the data before rendering it in the browser context. This allows an attacker to inject malicious JavaScript code that executes within the context of the web interface, potentially enabling session hijacking, data theft, or privilege escalation. The vulnerability is particularly concerning because it requires only adjacent access rather than remote network access, making it more accessible to attackers who can physically approach the target hardware or have network access to the same local segment.
The operational impact of this vulnerability extends beyond simple script injection, as it creates potential pathways for attackers to escalate privileges within the system. An attacker who successfully exploits this XSS vulnerability could potentially gain access to administrative functions within the web interface, allowing them to modify system settings, access sensitive configuration data, or even manipulate the firmware update process. This could lead to complete system compromise, especially if the web interface provides access to critical system functions or if the attacker can leverage the vulnerability to gain elevated privileges. The vulnerability affects a broad range of Intel server products, making it a significant concern for enterprise environments that rely on these platforms for critical infrastructure.
Mitigation strategies for this vulnerability should focus on immediate firmware updates to version 1.59 or later, which contain the necessary security patches to address the cross-site scripting flaw. Organizations should also implement network segmentation to limit adjacent access to these systems, particularly in environments where physical security is insufficient. Additional protective measures include configuring web application firewalls to detect and block suspicious script injection attempts, implementing strict input validation on all web interfaces, and conducting regular security assessments of management interfaces. The vulnerability aligns with ATT&CK technique T1059.007 for scripting and T1547.001 for registry run keys, as attackers may attempt to establish persistence through malicious scripts injected via the web interface. Organizations should also review their access controls and privilege management policies to ensure that administrative functions are properly secured and that least privilege principles are enforced across all management interfaces.