CVE-2021-31571 Explained : Impact and Mitigation

Amazon Web Services FreeRTOS before version 10.4.3 is affected by an integer overflow vulnerability in the queue creation process.

Understanding CVE-2021-31571

This CVE concerns an integer overflow issue present in the kernel of Amazon Web Services FreeRTOS, impacting the queue creation functionality.

What is CVE-2021-31571?

The vulnerability in Amazon Web Services FreeRTOS before version 10.4.3 involves an integer overflow specifically within the queue.c file during queue creation.

The Impact of CVE-2021-31571

The integer overflow vulnerability in FreeRTOS can potentially be exploited by attackers to execute arbitrary code, leading to a compromise of the affected system.

Technical Details of CVE-2021-31571

This section delves deeper into the technical aspects of the CVE.

Vulnerability Description

The issue arises from inadequate validation of user-supplied input, causing the integer overflow during the creation of a queue in FreeRTOS.

Affected Systems and Versions

Amazon Web Services FreeRTOS versions prior to 10.4.3 are affected by this vulnerability.

Exploitation Mechanism

By manipulating the inputs related to queue creation, threat actors may craft malicious payloads to trigger the integer overflow and potentially execute arbitrary code.

Mitigation and Prevention

To address CVE-2021-31571, mitigation steps and best practices can help enhance system security.

Immediate Steps to Take

Immediately update the affected FreeRTOS instances to version 10.4.3 or later to mitigate the integer overflow vulnerability in the queue creation process.

Long-Term Security Practices

Implement secure coding practices, input validation mechanisms, and regular security audits to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly monitor for security advisories from Amazon Web Services and apply relevant patches promptly to secure the FreeRTOS environment.