CVE-2022-24938 : Security Advisory and Response

A vulnerability in the Ember ZNet stack has been identified with CVE-2022-24938, allowing attackers to trigger a stack overflow by sending a malformed packet. This results in an assertion which then leads to a system reset, effectively clearing the error.

Understanding CVE-2022-24938

This section will delve into the specifics of CVE-2022-24938, including its impact, technical details, and mitigation strategies.

What is CVE-2022-24938?

The vulnerability in CVE-2022-24938 arises from a stack overflow triggered by a malformed packet in the Ember ZNet stack. The resulting assertion and system reset may lead to service disruptions and potential exploitation by threat actors.

The Impact of CVE-2022-24938

CVE-2022-24938 has a CVSS v3.1 base score of 6.5 with a Medium severity rating. It allows attackers to disrupt the availability of affected systems. The vulnerability falls under CAPEC-100 'Overflow Buffers,' increasing the risk of exploitation.

Technical Details of CVE-2022-24938

Understanding the technical aspects of CVE-2022-24938 is crucial for addressing and mitigating this security issue.

Vulnerability Description

A malformed packet triggers a stack overflow in the Ember ZNet stack, causing an assertion that leads to a system reset. This behavior immediately clears the error but can be exploited by malicious actors.

Affected Systems and Versions

The vulnerability affects Ember ZNet version 1.0.0, specifically versions less than or equal to 7.0.1. Systems running these versions are at risk of exploitation through the described attack vector.

Exploitation Mechanism

Attackers can exploit CVE-2022-24938 by sending specially crafted packets to targeted systems running vulnerable versions of Ember ZNet. This malicious action triggers the stack overflow, resulting in a system reset.

Mitigation and Prevention

Taking immediate steps to address CVE-2022-24938 is crucial to safeguard affected systems and prevent potential security breaches.

Immediate Steps to Take

Update Ember ZNet to versions beyond 7.0.1 to mitigate the risk of stack overflow exploitation.
Monitor network traffic for any signs of anomalies or malicious activity that could indicate an attempted attack.

Long-Term Security Practices

Regularly apply security patches and updates to ensure the protection of systems against known vulnerabilities.
Conduct security audits and penetration testing to identify and address weaknesses in the network infrastructure.

Patching and Updates

Refer to the provided vendor advisory links for patches and updates to address CVE-2022-24938 effectively.