CVE-2023-4257 : Vulnerability Insights and Analysis
Learn about CVE-2023-4257 impacting Zephyr project's WiFi shell module, allowing buffer overflows due to unchecked user input lengths. High severity with a CVSSv3.1 base score of 7.6. Take immediate steps to mitigate risks.
This CVE record pertains to an issue in the Zephyr project's WiFi shell module that allows for buffer overflows due to unchecked user input length.
Understanding CVE-2023-4257
This section delves deeper into the details surrounding CVE-2023-4257.
What is CVE-2023-4257?
The vulnerability in question involves unchecked user input length in the Zephyr WiFi shell module, specifically in the /subsys/net/l2/wifi/wifi_shell.c file. This unchecked input length can lead to buffer overflows.
The Impact of CVE-2023-4257
The impact of this vulnerability is rated as high, with a CVSSv3.1 base score of 7.6. It falls under CAPEC-100 (Overflow Buffers) and poses a risk of unauthorized access and potential system compromise.
Technical Details of CVE-2023-4257
This section provides technical insights into CVE-2023-4257.
Vulnerability Description
The vulnerability arises from unchecked user input length in the Zephyr WiFi shell module, specifically in the /subsys/net/l2/wifi/wifi_shell.c file, which can result in buffer overflows.
Affected Systems and Versions
The affected product is Zephyr with versions less than or equal to 3.4, specifically version 0 in the git repository.
Exploitation Mechanism
Attackers can exploit this vulnerability by providing excessively long user inputs, triggering buffer overflows and potentially executing malicious code.
Mitigation and Prevention
In order to mitigate the risks associated with CVE-2023-4257, certain steps can be taken.
Immediate Steps to Take
Developers are advised to implement input validation mechanisms, specifically checking input lengths to prevent buffer overflows. Users should update to patched versions or apply relevant security fixes promptly.
Long-Term Security Practices
Implement secure coding practices, conduct regular security audits, and educate developers on secure coding techniques and the implications of unchecked input lengths.
Patching and Updates
It is crucial for users to stay informed about security advisories and updates from the Zephyr project. Applying patches and updates in a timely manner is essential to mitigate the risks posed by CVE-2023-4257.