CVE-2018-12196 in AMT
Summary
by MITRE
Insufficient input validation in Intel(R) AMT in Intel(R) CSME before version 11.8.60, 11.11.60, 11.22.60 or 12.0.20 may allow a privileged user to potentially execute arbitrary code via local access.
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Analysis
by VulDB Data Team • 05/16/2020
The vulnerability identified as CVE-2018-12196 represents a critical security flaw within Intel Active Management Technology components that affects multiple versions of Intel Converged Security and Management Engine. This issue stems from inadequate input validation mechanisms within the management engine's processing pipeline, creating a potential attack vector for privilege escalation. The vulnerability specifically impacts systems where Intel AMT operates in environments with potentially malicious local users who can leverage the flawed validation to execute arbitrary code. The affected versions span across several major releases including CSME versions 11.8.60, 11.11.60, 11.22.60, and 12.0.20, indicating a widespread exposure across Intel's management engine implementations. This flaw operates at a low system level where the management engine typically runs with elevated privileges, making the potential impact significantly more severe than typical software vulnerabilities. The vulnerability's classification aligns with CWE-20, which describes improper input validation as a fundamental weakness in software design that allows malicious inputs to bypass validation checks and potentially execute unauthorized operations within the system.
The technical implementation of this vulnerability demonstrates how insufficient validation can create a pathway for privilege escalation attacks within the management engine environment. When a privileged user accesses the system through local means, the flawed input validation allows them to inject malicious payloads that the system processes without proper sanitization or verification. The management engine's architecture typically operates with high system privileges and direct hardware access capabilities, making this vulnerability particularly dangerous as it could enable an attacker to gain control over critical system functions. The local access requirement suggests that this vulnerability does not directly expose itself to network-based attacks, but rather represents an internal threat vector where compromised local accounts or legitimate administrative access can be leveraged. This characteristic places the vulnerability in the ATT&CK framework under privilege escalation techniques, specifically targeting the system's management engine components that operate outside of normal user access controls. The validation failure occurs at the input processing layer where the system fails to properly validate or sanitize inputs that flow into critical processing functions, creating a direct path for code execution.
The operational impact of CVE-2018-12196 extends beyond simple code execution to encompass potential complete system compromise and unauthorized access to sensitive management functions. Attackers who can establish local access and exploit this vulnerability could potentially gain root-level access to the system's management engine, enabling them to manipulate firmware settings, extract sensitive configuration data, or even modify system behavior. The management engine's role as a persistent system component means that successful exploitation could provide attackers with long-term access to affected systems. Organizations with multiple systems running vulnerable versions of Intel CSME could face widespread compromise if attackers gain access to local administrative accounts. The vulnerability's presence in multiple version streams indicates that organizations need to implement comprehensive patch management strategies across their entire Intel AMT ecosystem. The attack surface is particularly concerning for enterprise environments where management engines are often deployed with extensive access to system resources and network interfaces.
Mitigation strategies for CVE-2018-12196 focus primarily on implementing timely patch updates from Intel to address the specific input validation flaws within the management engine. Organizations should prioritize updating their Intel CSME firmware to versions 11.8.60, 11.11.60, 11.22.60, or 12.0.20, depending on their current system configuration. Additionally, system administrators should implement strict access controls and monitoring for local administrative accounts to reduce the risk of unauthorized access. Network segmentation and firewall rules should be configured to limit access to management engine ports and services, even when local access is compromised. Security monitoring solutions should be enhanced to detect unusual activity patterns that might indicate exploitation attempts. The vulnerability's nature makes it particularly important for organizations to implement comprehensive system hardening practices, including disabling unnecessary management engine features and ensuring that only trusted administrators have local access to affected systems. Organizations should also consider implementing additional layers of security monitoring specifically targeting the management engine's operational parameters and access logs to detect potential exploitation attempts. The remediation approach should align with security frameworks that emphasize defense in depth and proper system access controls as outlined in industry standards for enterprise security management.