CVE-2021-40404 : Exploit Details and Defense Strategies

This CVE-2021-40404 article provides details about an authentication bypass vulnerability in the cgiserver.cgi Login functionality of Reolink RLC-410W v3.0.0.136_20121102.

Understanding CVE-2021-40404

This section delves deeper into the authentication bypass vulnerability found in the Reolink device.

What is CVE-2021-40404?

The vulnerability in the cgiserver.cgi Login function allows an attacker to bypass authentication by sending a specially-crafted HTTP request.

The Impact of CVE-2021-40404

The impact is rated as medium with a CVSS base score of 5.3. The vulnerability requires low attack complexity and has an integrity impact of low.

Technical Details of CVE-2021-40404

This section provides technical specifics of the CVE.

Vulnerability Description

The vulnerability permits an attacker to bypass authentication through a specially-crafted HTTP request.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: RLC-410W v3.0.0.136_20121102 is affected

Exploitation Mechanism

The attacker sends a malicious HTTP request to trigger the vulnerability, leading to an authentication bypass.

Mitigation and Prevention

Outlined are steps to mitigate and prevent exploitation of this vulnerability.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly
Monitor network traffic for any suspicious activity
Implement network segmentation to restrict access

Long-Term Security Practices

Regularly update firmware and software of devices
Conduct security training for personnel to enhance awareness
Employ network firewalls and intrusion detection systems

Patching and Updates

Ensure timely application of security patches provided by Reolink for the affected device.