CVE-2021-30331 Explained : Impact and Mitigation

This article provides insights into CVE-2021-30331, a vulnerability affecting various Qualcomm products and versions.

Understanding CVE-2021-30331

In this section, we delve into the details of the CVE-2021-30331 vulnerability.

What is CVE-2021-30331?

The vulnerability involves a potential buffer overflow caused by inadequate validation of external commands via the DIAG interface in multiple Qualcomm products, including Snapdragon Auto, Compute, Connectivity, Consumer IOT, Industrial IOT, Mobile, and Wearables.

The Impact of CVE-2021-30331

The CVSSv3.1 Base Score for this vulnerability is 5.5, with a High Confidentiality Impact but no Integrity or Availability Impact. The attack complexity is rated as LOW, requiring low privileges.

Technical Details of CVE-2021-30331

In this section, we explore the technical aspects of CVE-2021-30331.

Vulnerability Description

The vulnerability arises due to improper data validation of external commands, potentially leading to a buffer overflow.

Affected Systems and Versions

Qualcomm products affected include AR8035, FSM10055, MDM9150, SD675, SD865 5G, and many others across Snapdragon lineups.

Exploitation Mechanism

The vulnerability could be exploited by sending external commands via the DIAG interface, which are not adequately validated.

Mitigation and Prevention

Here we discuss steps to mitigate and prevent the impact of CVE-2021-30331.

Immediate Steps to Take

Affected users should apply security patches provided by Qualcomm promptly and stay updated with security bulletins.

Long-Term Security Practices

Implement robust security measures, such as network segmentation, access controls, and regular security audits, to enhance overall cybersecurity.

Patching and Updates

Regularly check for security updates and apply patches as soon as they are released by Qualcomm to address the vulnerability effectively.