CVE-2021-35123 : Security Advisory and Response

A buffer copy vulnerability in GATT multi-notification can lead to a high impact on Snapdragon Connectivity and Snapdragon Industrial IOT devices due to a lack of proper length checks for incoming data.

Understanding CVE-2021-35123

This CVE details a critical vulnerability in Qualcomm's Snapdragon products, affecting various versions with a severe CVSS base score.

What is CVE-2021-35123?

The CVE-2021-35123 involves a buffer copy vulnerability in GATT multi-notification, caused by inadequate length verification for data received over-the-air in Snapdragon Connectivity and Snapdragon Industrial IOT products.

The Impact of CVE-2021-35123

With a high CVSS base score of 8.8, this vulnerability poses a significant threat to the confidentiality, integrity, and availability of affected devices. Attackers can potentially execute malicious activities without requiring any user interaction.

Technical Details of CVE-2021-35123

The technical details of CVE-2021-35123 shed light on the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability arises from a buffer copy operation in GATT multi-notification due to a lack of proper length checks for incoming data, providing attackers with opportunities to exploit the system.

Affected Systems and Versions

Qualcomm's Snapdragon Connectivity and Snapdragon Industrial IOT devices running specific versions such as AQT1000, SD855, SD870, and more are affected by this security flaw.

Exploitation Mechanism

Attackers can leverage this vulnerability to execute arbitrary code, compromise data integrity, and disrupt the availability of the affected devices, leading to severe consequences.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-35123, immediate steps should be taken along with the implementation of long-term security practices and timely patching and updates.

Immediate Steps to Take

Device users and administrators are advised to apply relevant patches and security updates provided by Qualcomm to address this vulnerability promptly.

Long-Term Security Practices

Implementing robust security measures, following best practices in device configurations, and staying informed about security bulletins can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly check for firmware updates and security advisories from Qualcomm to deploy patches that address CVE-2021-35123 and enhance the overall security posture of the affected devices.