CVE-2021-34401 Explained : Impact and Mitigation
Discover how CVE-2021-34401 impacts NVIDIA's SHIELD TV devices with a vulnerability allowing code execution and denial of service. Learn about mitigation steps here.
NVIDIA Linux kernel distributions contain a vulnerability in nvmap NVGPU_IOCTL_CHANNEL_SET_ERROR_NOTIFIER, where improper access control may lead to code execution, compromised integrity, or denial of service.
Understanding CVE-2021-34401
This CVE identifies a vulnerability in NVIDIA's SHIELD TV affecting all versions prior to SE 9.0.
What is CVE-2021-34401?
The vulnerability in NVIDIA Linux kernel distributions allows attackers to potentially execute arbitrary code, compromise the system's integrity, or cause denial of service due to improper access control.
The Impact of CVE-2021-34401
With a CVSS base score of 7.8 (High), the vulnerability poses a significant risk, especially in terms of confidentiality, integrity, and availability. Attackers with low privileges can exploit this locally without user interaction.
Technical Details of CVE-2021-34401
This section provides a deeper insight into the vulnerability.
Vulnerability Description
The vulnerability resides in nvmap NVGPU_IOCTL_CHANNEL_SET_ERROR_NOTIFIER in NVIDIA Linux kernel distributions, allowing attackers to potentially execute arbitrary code, compromise integrity, or cause a denial of service.
Affected Systems and Versions
NVIDIA's SHIELD TV devices running versions prior to SE 9.0 are affected by this vulnerability.
Exploitation Mechanism
By exploiting improper access control in the nvmap NVGPU_IOCTL_CHANNEL_SET_ERROR_NOTIFIER, attackers can achieve code execution, compromise system integrity, and disrupt services.
Mitigation and Prevention
To safeguard systems from CVE-2021-34401, immediate actions and long-term security practices are recommended.
Immediate Steps to Take
Users are advised to update their SHIELD TV devices to SE 9.0 or later versions to mitigate the vulnerability. Additionally, monitor for any signs of unauthorized activity.
Long-Term Security Practices
Implement security best practices such as regular software updates, network segmentation, and access control measures to enhance overall system security.
Patching and Updates
NVIDIA may release patches or updates to address CVE-2021-34401. Stay informed about security advisories and apply relevant patches promptly to secure your systems.