CVE-2021-44416 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. A specially-crafted HTTP request can lead to a reboot due to improper input validation.

Understanding CVE-2021-44416

This CVE is related to a denial of service vulnerability in specific versions of the reolink RLC-410W security camera.

What is CVE-2021-44416?

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

The Impact of CVE-2021-44416

Base Score: 8.6 (High)
Attack Vector: Network
Attack Complexity: Low
Availability Impact: High
Privileges Required: None
Scope: Changed
CWE ID: CWE-20: Improper Input Validation

Technical Details of CVE-2021-44416

This section covers the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability exists in the cgiserver.cgi JSON command parser functionality, allowing an attacker to cause a denial of service by sending a specially-crafted HTTP request.

Affected Systems and Versions

Affected Version: reolink RLC-410W v3.0.0.136_20121102
Vendor: Not applicable
Product: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by an attacker sending a specific HTTP request, triggering the reboot due to the disconnect parameter not being correctly handled.

Mitigation and Prevention

Actions to mitigate the impact of CVE-2021-44416.

Immediate Steps to Take

Update the affected device to a patched version if available.
Implement network controls to limit access to the vulnerable component.
Monitor for any unusual HTTP requests to the cgiserver.cgi endpoint.

Long-Term Security Practices

Regularly update firmware and software to address known vulnerabilities.
Conduct security assessments and penetration testing on IoT devices to identify weaknesses.

Patching and Updates

Check with the vendor for any available patches or security updates.
Apply recommended security configurations to enhance system resilience and security.