CVE-2021-37388 : Security Advisory and Response

A buffer overflow vulnerability has been identified in D-Link DIR-615 C2 3.03WW, where the ping_ipaddr parameter in ping_response.cgi POST request can be exploited by attackers to crash the webserver and potentially achieve remote code execution.

Understanding CVE-2021-37388

This section will delve into the details of the CVE-2021-37388 vulnerability, its impact, technical description, affected systems, exploitation mechanism, and mitigation strategies.

What is CVE-2021-37388?

The CVE-2021-37388 vulnerability is a buffer overflow issue in the D-Link DIR-615 C2 3.03WW router. By manipulating the ping_ipaddr parameter in a specific POST request, malicious actors can cause the webserver to crash, and in severe cases, execute arbitrary remote code.

The Impact of CVE-2021-37388

The impact of CVE-2021-37388 is significant, as it allows attackers to disrupt the normal functioning of the webserver and potentially gain unauthorized remote access to the device. This could lead to a range of malicious activities and compromise the security and integrity of the system.

Technical Details of CVE-2021-37388

Let's explore the technical specifics of CVE-2021-37388, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability stems from a buffer overflow issue in D-Link DIR-615 C2 3.03WW, specifically in the ping_ipaddr parameter within the ping_response.cgi POST request. This flaw can be leveraged by attackers to overrun the buffer, leading to a crash or potential code execution.

Affected Systems and Versions

The affected system is the D-Link DIR-615 C2 3.03WW router. All versions of this particular router are vulnerable to CVE-2021-37388, making it crucial for users to take immediate action to secure their devices.

Exploitation Mechanism

To exploit CVE-2021-37388, a threat actor needs to send a crafted POST request containing a malicious payload to the ping_ipaddr parameter. Upon successful execution, this could crash the webserver and create an opportunity for remote code execution.

Mitigation and Prevention

In this section, we will outline the necessary steps to mitigate the risks associated with CVE-2021-37388 and prevent potential exploitation.

Immediate Steps to Take

Users are strongly advised to update their D-Link DIR-615 C2 3.03WW routers to the latest firmware version provided by the vendor. Additionally, implementing firewall rules to restrict access to the webserver can help reduce the attack surface.

Long-Term Security Practices

It is recommended to regularly monitor for firmware updates and security advisories from D-Link to stay informed about potential vulnerabilities. Employing network segmentation and strong access controls can also enhance the overall security posture.

Patching and Updates

Stay vigilant for any security patches or updates released by D-Link specifically addressing CVE-2021-37388. Applying patches promptly is critical to closing off known vulnerabilities and safeguarding the devices against exploitation.