CVE-2021-3432 : Vulnerability Insights and Analysis

This CVE-2021-3432 vulnerability affects Zephyr versions v1.14.0 and v2.5.0. The issue arises from an invalid interval in CONNECT_IND, leading to Division by Zero.

Understanding CVE-2021-3432

This section delves into the details of the vulnerability.

What is CVE-2021-3432?

The vulnerability in Zephyr versions v1.14.0 and v2.5.0 is caused by an invalid interval in CONNECT_IND resulting in Division by Zero, categorized under CWE-369.

The Impact of CVE-2021-3432

The impact of this vulnerability is rated as medium, with a CVSS v3.1 base score of 4.3. It has low attack complexity, occurring in an adjacent network with low availability impact.

Technical Details of CVE-2021-3432

This section provides in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability arises from an invalid interval in CONNECT_IND, leading to Division by Zero.

Affected Systems and Versions

Zephyr versions v1.14.0 and v2.5.0 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by manipulating the interval in the CONNECT_IND process.

Mitigation and Prevention

Protecting systems from CVE-2021-3432 requires immediate action and long-term security measures.

Immediate Steps to Take

Update Zephyr to patched versions v1.14.1 and v2.5.1 to mitigate the vulnerability.

Long-Term Security Practices

Regularly update Zephyr to the latest releases and follow secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Ensure timely patching of Zephyr software to address known vulnerabilities.