CVE-2021-35071 Explained : Impact and Mitigation
Learn about CVE-2021-35071, a vulnerability in various Qualcomm products that can lead to a denial of service. Understand the impact, technical details, affected systems, and mitigation steps.
This article provides detailed information about CVE-2021-35071, a vulnerability in various Qualcomm products that can lead to a denial of service due to a buffer over-read issue.
Understanding CVE-2021-35071
CVE-2021-35071 is a vulnerability in multiple Qualcomm products that could be exploited to cause a denial of service attack.
What is CVE-2021-35071?
The CVE-2021-35071 vulnerability stems from a possible buffer over-read due to insufficient size validation when copying data from the DBR buffer to the RX buffer. This flaw affects a wide range of Qualcomm products.
The Impact of CVE-2021-35071
If exploited, this vulnerability could lead to a denial of service in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables, Snapdragon Wired Infrastructure, and Networking.
Technical Details of CVE-2021-35071
CVE-2021-35071 has a CVSS V3.1 base score of 5.5, with low attack complexity, local attack vector, and high availability impact. The privilege required is low, with no user interaction needed.
Vulnerability Description
The vulnerability involves a buffer over-read in WLAN, which, if leveraged, could result in a denial of service.
Affected Systems and Versions
Various Qualcomm products are impacted, including but not limited to AQT1000, AR8035, AR9380, CSR8811, and many more listed in the vendor's advisory.
Exploitation Mechanism
The vulnerability stems from a lack of size validation while copying data, allowing attackers to exploit the issue to trigger a denial of service.
Mitigation and Prevention
To mitigate the risk associated with CVE-2021-35071, users are advised to take immediate steps and adopt long-term security measures.
Immediate Steps to Take
Users should monitor vendor communications for patches and updates, apply relevant security updates promptly, and closely follow the guidance provided by Qualcomm.
Long-Term Security Practices
In the long term, organizations should implement robust security practices, conduct regular security assessments, and stay informed about potential threats and vulnerabilities.
Patching and Updates
It is crucial to apply security patches and firmware updates released by Qualcomm to address the CVE-2021-35071 vulnerability and enhance the security of the affected products.