CVE-2021-44391 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.

Understanding CVE-2021-44391

This CVE involves a denial of service vulnerability in Reolink RLC-410W cameras.

What is CVE-2021-44391?

The vulnerability exists in the cgiserver.cgi JSON command parser of the affected camera, where a specific HTTP request can cause the device to reboot due to an issue with the 'GetEnc' parameter.

The Impact of CVE-2021-44391

This vulnerability has a CVSS base score of 8.6, indicating a high severity issue with a significant impact on system availability.

Technical Details of CVE-2021-44391

This section dives into the technical aspects of the CVE.

Vulnerability Description

The flaw allows an attacker to send a crafted HTTP request, triggering the reboot of the device, potentially leading to a denial of service.

Affected Systems and Versions

System: Reolink RLC-410W v3.0.0.136_20121102
Versions: All versions susceptible to the described vulnerability

Exploitation Mechanism

The vulnerability can be exploited by sending a malicious HTTP request that manipulates the 'GetEnc' parameter, causing the device to reboot.

Mitigation and Prevention

Protecting against and addressing the vulnerability.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor network traffic for any suspicious activity targeting the affected device.

Long-Term Security Practices

Regularly update firmware to the latest version to address known vulnerabilities.
Implement network segmentation to isolate vulnerable devices from critical systems.

Patching and Updates

Ensure timely application of security updates and patches to mitigate the risk of exploitation.