CVE-2021-44386 Explained : Impact and Mitigation

A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121102, potentially allowing an attacker to reboot the device.

Understanding CVE-2021-44386

What is CVE-2021-44386?

This CVE describes a vulnerability in the JSON command parser of Reolink RLC-410W cameras that can be exploited through a specially-crafted HTTP request, leading to a denial of service by rebooting the system.

The Impact of CVE-2021-44386

The vulnerability has a CVSS base score of 8.6 (High) with a high impact on availability.

Technical Details of CVE-2021-44386

Vulnerability Description

A denial of service vulnerability in cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102 allows an attacker to trigger a reboot with a crafted HTTP request.

Affected Systems and Versions

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

Exploitation Mechanism

An attacker sends a specially-crafted HTTP request to the SetPtzPatrol param, leading to a system reboot.

Mitigation and Prevention

Immediate Steps to Take

Implement network segmentation to limit exposure.
Monitor and block malicious requests to the vulnerable endpoint.

Long-Term Security Practices

Regularly update and patch the firmware of the affected device.
Conduct security assessments and penetration testing periodically.
Stay informed about new vulnerabilities and security best practices.