CVE-2021-3323 : Security Advisory and Response

This article provides an in-depth overview of CVE-2021-3323, highlighting the impact, technical details, and mitigation strategies.

Understanding CVE-2021-3323

CVE-2021-3323 relates to an Integer Underflow vulnerability in Zephyr affecting versions >=2.4.0.

What is CVE-2021-3323?

The CVE-2021-3323 vulnerability involves an Integer Underflow in 6LoWPAN IPHC Header Uncompression in Zephyr, leading to potential security risks.

The Impact of CVE-2021-3323

With a CVSS base score of 8.3, this vulnerability poses a high severity risk with low confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-3323

This section delves into the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from an Integer Underflow in 6LoWPAN IPHC Header Uncompression within Zephyr versions >=2.4.0.

Affected Systems and Versions

Zephyr versions >=2.4.0 are affected by this Integer Underflow vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering malicious activities to exploit the Integer Underflow issue.

Mitigation and Prevention

Discover the immediate steps to take to secure your systems and long-term security practices to implement for protection against CVE-2021-3323.

Immediate Steps to Take

Immediately update Zephyr versions to mitigate the Integer Underflow vulnerability.

Long-Term Security Practices

Incorporate robust security measures and regular vulnerability assessments to enhance system security.

Patching and Updates

Stay informed about security patches and updates released by Zephyrproject-rtos to address CVE-2021-3323.