CVE-2021-40423 : Security Advisory and Response

This CVE-2021-40423 article provides details about a denial of service vulnerability in Reolink RLC-410W v3.0.0.136_20121102.

Understanding CVE-2021-40423

CVE-2021-40423 is a high-severity vulnerability affecting Reolink RLC-410W v3.0.0.136_20121102, allowing a denial of service attack.

What is CVE-2021-40423?

A denial of service vulnerability exists in the cgiserver.cgi API command parser of Reolink RLC-410W v3.0.0.136_20121102, triggered by specially-crafted HTTP requests.

The Impact of CVE-2021-40423

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Availability Impact: High
The vulnerability can be exploited by an attacker sending malicious HTTP requests, leading to denial of service.

Technical Details of CVE-2021-40423

This section covers detailed technical aspects of the vulnerability.

Vulnerability Description

Affects the cgiserver.cgi API command parser of Reolink RLC-410W v3.0.0.136_20121102
Allows an attacker to perform a denial of service attack

Affected Systems and Versions

Affected Version: Reolink RLC-410W v3.0.0.136_20121102

Exploitation Mechanism

Attacker crafts specific HTTP requests to exploit the vulnerability

Mitigation and Prevention

Learn how to mitigate and prevent the vulnerability.

Immediate Steps to Take

Disable access to vulnerable services or restrict access to trusted sources
Implement network monitoring to detect and block malicious requests

Long-Term Security Practices

Regularly update firmware and software for security patches
Conduct security assessments and penetration testing periodically

Patching and Updates

Check for security updates from the vendor regularly and apply patches promptly.