CVE-2021-34392 : Vulnerability Insights and Analysis

Trusty TLK contains a vulnerability in the NVIDIA TLK kernel where an integer overflow in the tz_map_shared_mem function can bypass boundary checks, leading to a denial of service.

Understanding CVE-2021-34392

This CVE describes a vulnerability in NVIDIA Jetson TX1 devices.

What is CVE-2021-34392?

The CVE-2021-34392 vulnerability exists in the NVIDIA TLK kernel of Trusty TLK. It allows an attacker to trigger an integer overflow in the tz_map_shared_mem function, circumventing boundary checks and potentially resulting in a denial of service.

The Impact of CVE-2021-34392

The impact of this vulnerability is rated as MEDIUM with a base score of 4.4. It requires low privileges to exploit but can have a significant availability impact if successfully taken advantage of. No confidentiality or integrity impact is reported.

Technical Details of CVE-2021-34392

This section provides specific technical details of the CVE.

Vulnerability Description

The vulnerability arises from an integer overflow in the tz_map_shared_mem function of the NVIDIA TLK kernel.

Affected Systems and Versions

All Jetson Linux versions prior to r32.5.1 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited locally with low privileges, requiring user interaction.

Mitigation and Prevention

To address CVE-2021-34392, follow these security measures.

Immediate Steps to Take

Users should update their NVIDIA Jetson TX1 devices to version r32.5.1 or later to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly monitor security advisories from NVIDIA and apply patches promptly to prevent security incidents.

Patching and Updates

Stay informed about security updates released by NVIDIA and ensure timely installation to maintain system security.