CVE-2021-44396 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. An attacker can trigger a reboot by sending a specially-crafted HTTP request.

Understanding CVE-2021-44396

What is CVE-2021-44396?

This CVE describes a denial of service vulnerability in the JSON command parser of Reolink RLC-410W v3.0.0.136_20121102, where an attacker can exploit a specially-crafted HTTP request to cause a reboot.

The Impact of CVE-2021-44396

The vulnerability has a CVSS base score of 8.6, indicating a high severity issue. It can lead to a denial of service with a significant impact on availability, requiring no privileges for exploitation.

Technical Details of CVE-2021-44396

Vulnerability Description

The vulnerability exists in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102, allowing an attacker to trigger a reboot through a malicious HTTP request.

Affected Systems and Versions

Product: Reolink RLC-410W v3.0.0.136_20121102
Version: Not specified

Exploitation Mechanism

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

Mitigation and Prevention

Immediate Steps to Take

Disable remote access if not required
Implement network controls to restrict access to the affected system

Long-Term Security Practices

Regularly update the firmware of the affected device
Conduct security assessments to identify and remediate vulnerabilities
Implement network intrusion detection and prevention systems

Patching and Updates

Ensure to apply any patches or updates provided by Reolink to address and mitigate the vulnerability.