CVE-2021-3430 : What You Need to Know
Learn about CVE-2021-3430, a Zephyr vulnerability involving an assertion reachable with repeated LL_CONNECTION_PARAM_REQ, its impact, technical details, and mitigation steps.
A detailed overview of CVE-2021-3430, its impact, technical details, and mitigation steps.
Understanding CVE-2021-3430
This section delves into the specifics of the CVE-2021-3430 vulnerability.
What is CVE-2021-3430?
The vulnerability involves an assertion reachable with repeated LL_CONNECTION_PARAM_REQ in Zephyr versions >= v1.14, leading to a Reachable Assertion (CWE-617).
The Impact of CVE-2021-3430
The vulnerability has a CVSS base score of 6.5 (Medium severity) and a high availability impact. Confidentiality and integrity impacts are none.
Technical Details of CVE-2021-3430
Exploring the technical aspects of CVE-2021-3430.
Vulnerability Description
The vulnerability arises due to an assertion reachable with repeated LL_CONNECTION_PARAM_REQ in Zephyr versions >= v1.14, resulting in a Reachable Assertion (CWE-617).
Affected Systems and Versions
Products affected include Zephyr with versions v1.14.0 and v2.5.0.
Exploitation Mechanism
The exploitation involves leveraging the assertion reachable with repeated LL_CONNECTION_PARAM_REQ to trigger the Reachable Assertion (CWE-617).
Mitigation and Prevention
Guidelines to mitigate and prevent the exploitation of CVE-2021-3430.
Immediate Steps to Take
Immediate actions include updating to a non-vulnerable version, monitoring for signs of exploitation, and applying vendor patches.
Long-Term Security Practices
Implement continuous security monitoring, conduct regular vulnerability assessments, and educate users on secure coding practices.
Patching and Updates
Stay informed about security advisories, regularly update software and systems to the latest patches, and follow best practices for secure development.