CVE-2021-44409 : 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 through a specially-crafted HTTP request, potentially leading to a reboot.

Understanding CVE-2021-44409

What is CVE-2021-44409?

The CVE-2021-44409 is a denial of service vulnerability in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102, which can be exploited through a specific HTTP request, causing the device to reboot.

The Impact of CVE-2021-44409

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

Technical Details of CVE-2021-44409

Vulnerability Description

The vulnerability arises from improper input validation in the cgiserver.cgi JSON command parser, enabling attackers to reboot the device through a malicious HTTP request.

Affected Systems and Versions

Affected System: reolink RLC-410W v3.0.0.136_20121102
Affected Version: v3.0.0.136_20121102

Exploitation Mechanism

The vulnerability can be exploited by sending a specially-crafted HTTP request to the cgiserver.cgi JSON command parser, causing a denial of service and potentially triggering a reboot.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches or updates to address the vulnerability.
Implement network-level protections to filter out malicious requests.

Long-Term Security Practices

Regularly monitor vendor security advisories and update devices promptly.
Conduct security assessments to identify and mitigate vulnerabilities proactively.

Patching and Updates

Ensure that the affected system is updated with the latest patches provided by the vendor to mitigate the vulnerability.