CVE-2021-1956 Explained : Impact and Mitigation
Discover how the CVE-2021-1956 vulnerability in Qualcomm devices can lead to interference with piconets. Learn the impact, technical details, and mitigation steps for this security flaw.
Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, and Snapdragon Voice & Music devices are affected by an improper handling vulnerability that can lead to interference with the piconet. Learn more about the impact, technical details, and mitigation strategies of CVE-2021-1956.
Understanding CVE-2021-1956
This section provides an overview of the CVE-2021-1956 vulnerability affecting Qualcomm devices.
What is CVE-2021-1956?
The vulnerability involves improper handling of ASB-U packets with L2CAP channel ID by a slave host, which can result in interference with the piconet on various Qualcomm devices.
The Impact of CVE-2021-1956
With a CVSS base score of 6.5, this medium severity vulnerability could allow adjacent network attackers to disrupt the availability of the affected systems.
Technical Details of CVE-2021-1956
Explore the technical aspects of CVE-2021-1957 to better understand the vulnerability.
Vulnerability Description
The flaw arises from the improper handling of ASB-U packets and L2CAP channel IDs, which could lead to interference with the piconet in the mentioned Qualcomm devices.
Affected Systems and Versions
Devices such as AQT1000, AR8035, CSRB31024, and many more are impacted by this vulnerability. Check the vendor's security bulletin for a detailed list of affected versions.
Exploitation Mechanism
The vulnerability can be exploited by an attacker within the adjacent network range, without the need for any special privileges, impacting system availability significantly.
Mitigation and Prevention
Discover the steps to mitigate and prevent the exploitation of CVE-2021-1956.
Immediate Steps to Take
Users are advised to apply security patches and updates provided by Qualcomm to address this vulnerability promptly.
Long-Term Security Practices
Implementing proper network segmentation and access controls can help prevent unauthorized access and potential disruptions to the Bluetooth functionality.
Patching and Updates
Stay informed about the latest security bulletins and patches released by Qualcomm to safeguard your devices against CVE-2021-1956.