CVE-2021-35073 : Security Advisory and Response

This CVE-2021-35073 advisory pertains to a possible assertion issue due to improper validation of the rank restriction field in various Qualcomm Snapdragon product lines, including Snapdragon Auto, Compute, Connectivity, Industrial IOT, and Mobile.

Understanding CVE-2021-35073

This section elaborates on the details, impact, technical aspects, and mitigation steps regarding CVE-2021-35073.

What is CVE-2021-35073?

The vulnerability involves a reachable assertion in the modem component of the affected Qualcomm Snapdragon products, potentially leading to an assertion due to improper validation of the rank restriction field.

The Impact of CVE-2021-35073

With a CVSS base score of 7.5 (High severity), this vulnerability could be exploited by an attacker over the network without requiring privileges, leading to high availability impact.

Technical Details of CVE-2021-35073

This section outlines the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The flaw arises from the improper validation of the rank restriction field, enabling a potential assertion issue within the modem of the Snapdragon products.

Affected Systems and Versions

The vulnerability affects a wide range of Qualcomm Snapdragon products, including AR8035, SDX55, SDX65, and more. Refer to the vendor's security bulletin for an exhaustive list.

Exploitation Mechanism

An attacker could exploit this vulnerability remotely over the network, with no user interaction required, leading to a denial of service scenario.

Mitigation and Prevention

This section provides guidance on immediate steps to take and long-term security best practices.

Immediate Steps to Take

It is recommended to apply patches provided by Qualcomm promptly to address this vulnerability. Stay informed about security updates and implement them without delay.

Long-Term Security Practices

Adopt a proactive approach to security by regularly updating your systems, monitoring for security advisories from vendors, and ensuring secure configurations.

Patching and Updates

Regularly check for security bulletins from Qualcomm and apply patches as soon as they are released to mitigate the risk of exploitation.