CVE-2021-34378 : Security Advisory and Response

Trusty contains a vulnerability in the HDCP service TA where bounds checking is missing in command 11. This may result in information disclosure, denial of service, or privilege escalation.

Understanding CVE-2021-34378

Trusty, a component in NVIDIA Jetson AGX Xavier series, Jetson Xavier NX, Jetson TX2 series, and Jetson TX2 NX, is affected by a vulnerability that could have serious implications if exploited.

What is CVE-2021-34378?

The vulnerability in the HDCP service TA in Trusty lacks proper bounds checking in command 11. An attacker could potentially exploit this flaw to disclose sensitive information, disrupt services, or gain escalated privileges.

The Impact of CVE-2021-34378

This vulnerability has a CVSS base score of 7.7 (High severity) with a high impact on confidentiality, integrity, and availability of affected systems. Successful exploitation could lead to severe consequences, including unauthorized access to sensitive data and service disruptions.

Technical Details of CVE-2021-34378

The technical details of CVE-2021-34378 shed light on the vulnerability that affects NVIDIA Jetson AGX Xavier series, Jetson Xavier NX, Jetson TX2 series, and Jetson TX2 NX.

Vulnerability Description

The missing bounds checking in command 11 of the HDCP service TA in Trusty allows for potential information disclosure, denial of service attacks, and privilege escalation, posing a significant risk to affected systems.

Affected Systems and Versions

All Jetson Linux versions prior to r32.5.1 are impacted by this vulnerability, affecting a range of NVIDIA Jetson products including AGX Xavier series, Xavier NX, TX2 series, and TX2 NX.

Exploitation Mechanism

The vulnerability can be exploited locally with high privileges required. An attacker could trigger the flaw through specific operations on memory buffers, resulting in serious security consequences.

Mitigation and Prevention

To address CVE-2021-34378, immediate actions and long-term security practices are crucial to safeguard systems from potential exploitation.

Immediate Steps to Take

It is recommended to apply necessary security patches and updates provided by NVIDIA to mitigate the risk associated with this vulnerability. Additionally, monitoring for any unusual activity on the affected systems is essential.

Long-Term Security Practices

Implementing robust security measures, conducting regular security audits, and staying informed about emerging vulnerabilities are vital for maintaining a secure environment and mitigating future risks.

Patching and Updates

Regularly check for updates from NVIDIA and apply patches promptly to ensure that systems are protected against known vulnerabilities and security threats.