CVE-2021-44373 : Security Advisory and Response

A denial of service vulnerability in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102 allows an attacker to trigger a reboot via a specially-crafted HTTP request.

Understanding CVE-2021-44373

This CVE involves a denial of service vulnerability in a specific product version.

What is CVE-2021-44373?

The vulnerability exists in the JSON command parser of a particular version of Reolink RLC-410W, enabling an attacker to cause a denial of service through an HTTP request.

The Impact of CVE-2021-44373

The vulnerability has a CVSS base score of 8.6, with a high impact on availability. It requires no privileges and can be exploited remotely.

Technical Details of CVE-2021-44373

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The issue lies in the cgiserver.cgi JSON command parser, where a crafted HTTP request can trigger a reboot due to improper handling of input.

Affected Systems and Versions

Affected Version: RLC-410W v3.0.0.136_20121102
Systems: Reolink RLC-410W

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Scope: Changed
No user interaction required

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2021-44373.

Immediate Steps to Take

Implement network controls to limit access to vulnerable services.
Monitor network traffic for suspicious activities.
Apply vendor-provided patches or updates promptly.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Perform security assessments and penetration tests.
Educate users and administrators on safe practices.

Patching and Updates

Check for patches and updates from the vendor.
Apply recommended security configurations to mitigate risks effectively.