CVE-2022-24939 : Exploit Details and Defense Strategies

A detailed article on the CVE-2022-24939 vulnerability in the Ember ZNet stack.

Understanding CVE-2022-24939

This section will cover the impact and technical details of the CVE-2022-24939 vulnerability.

What is CVE-2022-24939?

The CVE-2022-24939 vulnerability occurs in the Ember ZNet stack when a malformed packet with an invalid destination address triggers a stack overflow, leading to an assert and system reset.

The Impact of CVE-2022-24939

The vulnerability, identified as CAPEC-100 Overflow Buffers, has a CVSSv3.1 base score of 5.7 (Medium severity) with a high availability impact and low attack complexity.

Technical Details of CVE-2022-24939

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

Vulnerability Description

A malformed packet containing an invalid destination address causes a stack overflow in the Ember ZNet stack, triggering an assert and system reset to clear the error.

Affected Systems and Versions

The CVE affects Ember ZNet version 1.0.0 with versions less than or equal to 7.0.1 being vulnerable.

Exploitation Mechanism

The vulnerability can be exploited by sending a specifically crafted packet with an invalid destination address to trigger the stack overflow and assert behavior.

Mitigation and Prevention

Explore the immediate steps to take and long-term security practices to mitigate the CVE-2022-24939 vulnerability.

Immediate Steps to Take

Apply patches or updates provided by Silicon Labs to address the vulnerability promptly.
Implement network segmentation and access controls to limit exposure.

Long-Term Security Practices

Regularly monitor and update software and firmware to mitigate future vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.

Patching and Updates

Stay informed about security advisories from Silicon Labs and apply security patches as soon as they are available.