CVE-2021-44403 : Security Advisory and Response

A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. Learn more about the impact, technical details, and mitigation strategies.

Understanding CVE-2021-44403

This CVE involves a denial of service vulnerability affecting Reolink RLC-410W v3.0.0.136_20121102 through a specially-crafted HTTP request.

What is CVE-2021-44403?

The vulnerability in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102 can be exploited via HTTP requests to cause a reboot, leading to a denial of service.

The Impact of CVE-2021-44403

The CVE has a base score of 8.6, indicating a high severity level with a significant impact on availability, triggered by a specially-crafted HTTP request.

Technical Details of CVE-2021-44403

This section dives into the specifics of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw is in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102, where a crafted HTTP request triggers a reboot, causing denial of service.

Affected Systems and Versions

Product: Not Applicable
Vendor: Not Applicable
Version: RLC-410W v3.0.0.136_20121102

Exploitation Mechanism

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Changed
Impact: High

Mitigation and Prevention

Protect systems against CVE-2021-44403 by following these actionable steps.

Immediate Steps to Take

Monitor security advisories from Reolink for updates
Implement network controls to limit access to affected devices
Apply strong firewall rules to filter incoming HTTP requests

Long-Term Security Practices

Conduct regular security assessments and audits
Train employees on identifying and reporting suspicious activities

Patching and Updates

Apply patches or firmware updates released by Reolink promptly