CVE-2022-41140 : What You Need to Know

This CVE-2022-41140 vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple D-Link routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lighttpd service, which listens on TCP port 80 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.

Understanding CVE-2022-41140

This section will cover the details regarding the vulnerability, its impact, technical aspects, and mitigation strategies.

What is CVE-2022-41140?

CVE-2022-41140 is a security vulnerability that affects multiple D-Link routers, allowing attackers to run arbitrary code without requiring authentication. The flaw is in the lighttpd service on TCP port 80.

The Impact of CVE-2022-41140

The impact of this vulnerability is significant as it enables attackers to execute code at root level without authentication, posing a severe risk to the affected systems.

Technical Details of CVE-2022-41140

Let's delve deeper into the technical aspects of CVE-2022-41140.

Vulnerability Description

The vulnerability arises due to improper validation of user-supplied data length, leading to a stack-based buffer overflow in the lighttpd service.

Affected Systems and Versions

The CVE-2022-41140 affects multiple D-Link routers running version 1.30B07.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious data to the lighttpd service on TCP port 80, allowing them to execute code as root.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2022-41140 is crucial for maintaining the security of your systems.

Immediate Steps to Take

Immediately update the affected D-Link routers to the patched versions provided by the vendor. Ensure that access to port 80 is restricted to trusted sources.

Long-Term Security Practices

In the long term, follow security best practices, conduct regular security audits, and stay informed about potential vulnerabilities in your network infrastructure.

Patching and Updates

Regularly check for security updates from D-Link and apply patches promptly to safeguard your routers against known vulnerabilities.