CVE-2021-30323 : Security Advisory and Response

This article provides detailed information about CVE-2021-30323, a vulnerability affecting multiple Qualcomm products. The vulnerability arises from improper validation of the maximum size of data write to EFS file, potentially leading to memory corruption across various Qualcomm devices.

Understanding CVE-2021-30323

CVE-2021-30323 is a security vulnerability identified in a wide range of Qualcomm products due to a flaw in handling the size of data writes to EFS files. The vulnerability can result in memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, and Snapdragon Wearables.

What is CVE-2021-30323?

The vulnerability in CVE-2021-30323 is rooted in the incorrect validation of the maximum data write size to EFS files. Attackers can exploit this issue to trigger memory corruption, leading to potential security risks across the affected Qualcomm products.

The Impact of CVE-2021-30323

With a CVSS base score of 7.8, this vulnerability has a high severity rating. It poses a significant threat to confidentiality, integrity, and availability, making it crucial for users of Qualcomm products to implement necessary security measures promptly.

Technical Details of CVE-2021-30323

The following technical aspects are associated with CVE-2021-30323:

Vulnerability Description

The vulnerability revolves around improper validation of the maximum size of data write to EFS file, creating a pathway for memory corruption within the affected Qualcomm products.

Affected Systems and Versions

Numerous Qualcomm products are impacted by this vulnerability, including APQ8009W, APQ8017, MDM9205, SD845, and many more, spanning across various Snapdragon product lines and versions.

Exploitation Mechanism

The vulnerability is characterized by a low attack complexity, requiring local access and low privileges to exploit. However, the impact on system availability, confidentiality, and integrity is significant.

Mitigation and Prevention

To safeguard Qualcomm devices from the risks associated with CVE-2021-30323, consider the following mitigation strategies:

Immediate Steps to Take

Apply security patches provided by Qualcomm promptly
Monitor official bulletins and security announcements for updates

Long-Term Security Practices

Implement strict input validation mechanisms in all software components
Conduct regular security audits and assessments to detect vulnerabilities proactively

Patching and Updates

Ensure that all affected Qualcomm devices receive the latest security updates and patches to address the CVE-2021-30323 vulnerability effectively.