CVE-2021-34406 Explained : Impact and Mitigation
Learn about CVE-2021-34406, a medium-severity vulnerability in NVIDIA Tegra kernel driver impacting SHIELD TV devices. Find out the impact, affected versions, and mitigation steps.
NVIDIA Tegra kernel driver contains a vulnerability in NVHost, where a specific race condition can lead to a null pointer dereference, resulting in a system reboot. This vulnerability has a CVSS base score of 4.7, indicating a medium severity.
Understanding CVE-2021-34406
This section will cover the details of CVE-2021-34406, including its impact and technical aspects.
What is CVE-2021-34406?
The vulnerability in NVIDIA Tegra kernel driver can trigger a null pointer dereference due to a race condition in NVHost, potentially causing a system crash and reboot.
The Impact of CVE-2021-34406
With a CVSS base score of 4.7, this medium-severity vulnerability can be exploited locally. It can lead to a denial of service, impacting the availability of affected systems.
Technical Details of CVE-2021-34406
Let's dive into the technical aspects of CVE-2021-34406 to understand its implications and mitigations.
Vulnerability Description
The vulnerability arises from a race condition in NVHost, allowing an attacker to trigger a null pointer dereference, resulting in a system reboot.
Affected Systems and Versions
NVIDIA's SHIELD TV devices running versions prior to SE 9.0 are impacted by this vulnerability in the NVIDIA Tegra kernel driver.
Exploitation Mechanism
The vulnerability requires low privileges for exploitation and can be triggered locally, affecting the availability of the system.
Mitigation and Prevention
To safeguard systems from CVE-2021-34406, immediate steps and long-term security practices are essential.
Immediate Steps to Take
Users of affected NVIDIA SHIELD TV devices should apply security patches provided by NVIDIA promptly to mitigate the vulnerability.
Long-Term Security Practices
Regularly updating the firmware and implementing security best practices can help prevent similar vulnerabilities in the future.
Patching and Updates
Stay informed about security updates from NVIDIA and apply patches as soon as they are available to ensure system security.