CVE-2021-44364 : 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. An attacker can trigger this vulnerability via a specially-crafted HTTP request.

Understanding CVE-2021-44364

This CVE involves a denial of service vulnerability in a specific version of the Reolink RLC-410W.

What is CVE-2021-44364?

The vulnerability exists in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102, where a crafted HTTP request can lead to a reboot, as the SetWifi parameter is not properly validated.

The Impact of CVE-2021-44364

The impact is rated as high with a base score of 8.6, potentially causing denial of service due to a specially-crafted HTTP request.

Technical Details of CVE-2021-44364

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability is a denial of service issue in the cgiserver.cgi JSON command parser of Reolink RLC-410W, triggered by a malformed HTTP request.

Affected Systems and Versions

Affected Version: RLC-410W v3.0.0.136_20121102

Exploitation Mechanism

The vulnerability can be exploited by sending a specially-crafted HTTP request, causing the device to reboot.

Mitigation and Prevention

Protect systems from CVE-2021-44364 by following these steps:

Immediate Steps to Take

Monitor network traffic for any anomalous HTTP requests.
Implement network-level protections to filter out malicious requests.

Long-Term Security Practices

Regularly update the firmware of Reolink RLC-410W.
Conduct security assessments to identify and address potential vulnerabilities.
Educate users on safe browsing habits.
Disable unnecessary services that could be exploited.

Patching and Updates

Apply security patches provided by the vendor to address this vulnerability.