CVE-2021-44374 : 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 a reboot by sending a specially-crafted HTTP request.

Understanding CVE-2021-44374

What is CVE-2021-44374?

This CVE describes a denial of service vulnerability in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102, allowing an attacker to cause a system reboot through a malicious HTTP request.

The Impact of CVE-2021-44374

The vulnerability has a CVSS base score of 8.6 (High), with a high impact on availability. Attackers can exploit this issue remotely without requiring privileges, potentially leading to service disruption.

Technical Details of CVE-2021-44374

Vulnerability Description

The vulnerability arises due to improper input validation in the cgiserver.cgi JSON command parser of the affected device model and version. A specially-crafted HTTP request can exploit this flaw, causing a reboot.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: reolink RLC-410W v3.0.0.136_20121102

Exploitation Mechanism

The vulnerability can be exploited remotely via network access. Attackers can craft malicious HTTP requests to the affected functionality, triggering a system reboot.

Mitigation and Prevention

Immediate Steps to Take

Disable remote access to the affected device if not necessary.
Monitor network traffic for any suspicious HTTP requests towards cgiserver.cgi.
Apply vendor-supplied patches or updates promptly.

Long-Term Security Practices

Regularly update firmware to mitigate known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks on critical systems.
Conduct security assessments and penetration testing periodically.

Patching and Updates

It is crucial to install patches or updates provided by the vendor to address this vulnerability promptly.