CVE-2021-44369 : Exploit Details and Defense Strategies

A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121102 where a specially-crafted HTTP request can lead to a reboot. This CVE has a CVSS base score of 8.6, indicating a high severity issue.

Understanding CVE-2021-44369

What is CVE-2021-44369?

The CVE-2021-44369 is a denial of service vulnerability in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102.

The Impact of CVE-2021-44369

This vulnerability has a high CVSS base score of 8.6, with a high availability impact. It can be triggered via a specially-crafted HTTP request leading to a reboot.

Technical Details of CVE-2021-44369

Vulnerability Description

The issue lies in the JSON command parser of the cgiserver.cgi in Reolink RLC-410W, allowing an attacker to trigger a reboot through a crafted HTTP request.

Affected Systems and Versions

Vendor: Reolink
Product: RLC-410W
Version: v3.0.0.136_20121102

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
Scope: Changed
User Interaction: None
SetNtp param is not object, enabling an attacker to exploit this vulnerability with a specially-crafted HTTP request.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-supplied patches promptly once available.
Implement network segmentation to limit the impact of potential exploits.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch software and firmware to address known vulnerabilities.
Conduct security training for users to recognize and report potential security threats.

Patching and Updates

It is crucial to stay informed about security updates from Reolink and apply patches as soon as they are released.