CVE-2023-43238 : Security Advisory and Response
Discover the impact of CVE-2023-43238 affecting D-Link DIR-816 A2 v1.10CNB05 routers. Learn about the vulnerability, affected systems, exploitation, and mitigation steps.
A vulnerability in D-Link DIR-816 A2 v1.10CNB05 has been identified, allowing for a stack overflow via a specific parameter in a CGI file.
Understanding CVE-2023-43238
This CVE focuses on a stack overflow issue within the D-Link DIR-816 A2 router's firmware that can be exploited through a particular parameter in a specific CGI file.
What is CVE-2023-43238?
The CVE-2023-43238 vulnerability involves a stack overflow condition that occurs when handling the 'nvmacaddr' parameter in the 'form2Dhcpip.cgi' file on the D-Link DIR-816 A2 router running firmware version v1.10CNB05.
The Impact of CVE-2023-43238
Exploitation of this vulnerability could potentially lead to remote code execution, unauthorized access to sensitive information, or denial of service on the affected device.
Technical Details of CVE-2023-43238
This section outlines the specific technical aspects of the CVE.
Vulnerability Description
The vulnerability arises due to improper handling of user-supplied input in the 'form2Dhcpip.cgi' file, leading to a stack overflow, which can be abused by attackers to execute malicious code or disrupt services.
Affected Systems and Versions
The issue affects D-Link DIR-816 A2 routers specifically running firmware version v1.10CNB05.
Exploitation Mechanism
Attackers can craft a specially formatted 'nvmacaddr' parameter value to trigger the stack overflow in the 'form2Dhcpip.cgi' file, enabling them to achieve their malicious objectives.
Mitigation and Prevention
To address CVE-2023-43238 and enhance overall security, certain steps need to be taken immediately as well as in the long term.
Immediate Steps to Take
Users are advised to update the firmware of their D-Link DIR-816 A2 router to a patched version provided by the vendor. Additionally, monitoring network traffic for any suspicious activity can help detect potential exploitation attempts.
Long-Term Security Practices
Implementing network segmentation, strong access controls, regular security audits, and employee security awareness training can contribute to a more resilient security posture against such vulnerabilities.
Patching and Updates
Regularly checking for firmware updates from D-Link and promptly applying patches can help mitigate potential risks associated with CVE-2023-43238.