CVE-2021-44357 : Vulnerability Insights and Analysis

A denial of service vulnerability in the Reolink RLC-410W camera's JSON command parser allows attackers to trigger reboots through specially-crafted HTTP requests.

Understanding CVE-2021-44357

What is CVE-2021-44357?

Multiple denial of service vulnerabilities exist in the Reolink RLC-410W v3.0.0.136_20121102, where a malicious HTTP request can cause the device to reboot.

The Impact of CVE-2021-44357

The vulnerability has a high base score of 8.6 with a high severity level. An attacker can exploit this issue remotely without needing any user interaction, leading to service unavailability.

Technical Details of CVE-2021-44357

Vulnerability Description

The vulnerability stems from improper input validation in the cgiserver.cgi JSON command parser of the affected Reolink camera.

Affected Systems and Versions

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

Exploitation Mechanism

By sending a specially-crafted HTTP request to the affected device, an attacker can trigger the vulnerability, resulting in a denial of service condition.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Restrict network access to the camera to trusted systems only.
Monitor network traffic for any unusual patterns or request volumes.

Long-Term Security Practices

Regularly update firmware and software of IoT devices.
Implement network segmentation to isolate vulnerable devices.
Conduct security audits and penetration testing periodically.

Patching and Updates

Keep track of security advisories from Reolink and apply patches as soon as they are released.