CVE-2021-3435 : What You Need to Know

A detailed overview of CVE-2021-3435, focusing on information leakage vulnerability in Zephyr's le_ecred_conn_req() function.

Understanding CVE-2021-3435

This section delves into the impact, technical details, and mitigation strategies related to the CVE-2021-3435 vulnerability.

What is CVE-2021-3435?

The CVE-2021-3435 vulnerability involves information leakage in Zephyr's le_ecred_conn_req() function for versions >= v2.4.0, posing a risk of unauthorized data exposure.

The Impact of CVE-2021-3435

The vulnerability has a CVSS base score of 4, indicating a medium severity level with low confidentiality impact but the potential for information disclosure.

Technical Details of CVE-2021-3435

Explore specific technical aspects of the CVE-2021-3435 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from the misuse of uninitialized resources within le_ecred_conn_req(), allowing attackers to potentially access sensitive information.

Affected Systems and Versions

Zephyr versions >= v2.4.0 are impacted by this vulnerability, making it crucial for users to assess their system versions.

Exploitation Mechanism

Attackers with local access can leverage the information leakage in le_ecred_conn_req() to retrieve data, highlighting the importance of prompt mitigation.

Mitigation and Prevention

Learn how to address and prevent the CVE-2021-3435 vulnerability to enhance system security.

Immediate Steps to Take

Users are advised to update affected Zephyr versions to mitigate the information leakage risk, ensuring data confidentiality.

Long-Term Security Practices

Establishing robust security practices, such as regular vulnerability assessments, can safeguard systems against similar threats.

Patching and Updates

Staying informed about security patches and promptly applying updates is crucial in maintaining a secure Zephyr environment.