CVE-2021-34381 Explained : Impact and Mitigation

Trusty TLK contains a vulnerability in the NVIDIA TLK kernel function that allows an exploit of an integer overflow on the size parameter of the tz_map_shared_mem function, leading to potential denial of service, information disclosure, or data tampering.

Understanding CVE-2021-34381

This vulnerability affects NVIDIA Jetson TX1 devices running all Jetson Linux versions prior to r32.5.1.

What is CVE-2021-34381?

Trusty TLK vulnerability in the NVIDIA TLK kernel function permits exploitation of an integer overflow, posing risks of denial of service, data disclosure, or tampering.

The Impact of CVE-2021-34381

With a CVSSv3.1 base score of 6.7 (Medium Severity), the vulnerability has a high impact on confidentiality, integrity, and availability, requiring low privileges for exploitation.

Technical Details of CVE-2021-34381

The following information provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from a lack of checks allowing an integer overflow on the size parameter of the tz_map_shared_mem function in NVIDIA TLK kernel.

Affected Systems and Versions

All NVIDIA Jetson TX1 devices running versions of Jetson Linux earlier than r32.5.1 are affected by this security flaw.

Exploitation Mechanism

The exploitation involves using the vulnerability in the size parameter to trigger an integer overflow, potentially leading to denial of service, information disclosure, or data manipulation.

Mitigation and Prevention

To safeguard your system against CVE-2021-34381, consider the following mitigation strategies.

Immediate Steps to Take

Update affected systems to Jetson Linux version r32.5.1 or later to patch the vulnerability.
Monitor NVIDIA security advisories for any related updates or patches.

Long-Term Security Practices

Regularly update and patch all software, especially security-critical components like kernels.
Implement robust security protocols to prevent unauthorized system access.

Patching and Updates

Stay informed about security bulletins and updates from NVIDIA to address vulnerabilities promptly and ensure system security.