CVE-2020-12288 in ThunderBolt
Summary
by MITRE • 06/10/2021
Protection mechanism failure in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to potentially enable denial of service via local access.
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Analysis
by VulDB Data Team • 06/12/2021
The vulnerability identified as CVE-2020-12288 represents a critical protection mechanism failure within Intel Thunderbolt controller implementations that undermines fundamental security assurances. This flaw resides in the hardware-level controller architecture designed to manage Thunderbolt connections, which are widely deployed across enterprise and consumer computing platforms. The vulnerability specifically affects systems where Thunderbolt controllers fail to properly enforce access controls and authentication mechanisms, creating potential entry points for malicious actors who possess legitimate local access credentials.
The technical nature of this flaw stems from insufficient validation of connection requests and inadequate enforcement of security policies within the Thunderbolt controller firmware. When an authenticated user gains local access to a system equipped with vulnerable Thunderbolt controllers, they can exploit this weakness to manipulate the controller's behavior and potentially disrupt normal system operations. The vulnerability manifests as a failure in the controller's ability to properly distinguish between legitimate and malicious connection attempts, allowing unauthorized manipulation of the Thunderbolt subsystem. This protection mechanism failure creates a pathway for denial of service attacks that can severely impact system availability and operational continuity.
From an operational perspective, the impact of CVE-2020-12288 extends beyond simple service disruption to encompass broader security implications for organizations relying on Thunderbolt-enabled infrastructure. The vulnerability enables authenticated local users to potentially compromise system integrity through manipulation of hardware-level connections, which can result in complete system unavailability or data access disruption. This risk is particularly concerning in enterprise environments where Thunderbolt ports are frequently used for high-speed data transfer and external device connectivity. The local access requirement means that the attack vector is relatively accessible to users with legitimate system credentials, making this vulnerability particularly dangerous in insider threat scenarios or compromised user account situations.
Organizations should implement comprehensive mitigation strategies addressing both immediate operational concerns and long-term security posture improvements. The primary recommendation involves applying vendor-provided firmware updates and system patches that address the specific protection mechanism failure in affected Thunderbolt controllers. Additionally, system administrators should consider implementing additional access controls and monitoring protocols to detect anomalous Thunderbolt connection behavior. Network segmentation and privilege management policies should be reviewed to minimize potential attack surface expansion. This vulnerability aligns with CWE-307, which addresses inadequate protection of concurrent processes, and maps to ATT&CK technique T1068, involving the use of legitimate credentials for unauthorized access. The security implications extend to broader system availability and integrity concerns, making this vulnerability particularly significant for organizations maintaining high-security standards.