CVE-2021-44393 : Security Advisory and Response

A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2021-44393

This CVE describes a denial of service vulnerability in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102.

What is CVE-2021-44393?

The vulnerability allows an attacker to trigger a denial of service through a specially-crafted HTTP request, potentially leading to a reboot due to an issue with the GetIsp parameter.

The Impact of CVE-2021-44393

This vulnerability has a CVSS base score of 8.6 (High), with a high impact on availability. It requires no privileges and can be exploited over the network.

Technical Details of CVE-2021-44393

Get insights into the vulnerability specifics.

Vulnerability Description

The vulnerability resides in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102, triggered by a specially-crafted HTTP request.

Affected Systems and Versions

Affected system: reolink RLC-410W v3.0.0.136_20121102
Affected version: 3.0.0.136_20121102

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Availability Impact: High
Scope: Changed

Mitigation and Prevention

Learn how to mitigate the risk posed by this CVE.

Immediate Steps to Take

Implement network segmentation to limit access to vulnerable devices.
Monitor network traffic for signs of exploitation attempts.
Contact the vendor for patches or workarounds.

Long-Term Security Practices

Regularly update firmware and security patches.
Conduct security assessments and penetration testing.
Educate users about safe browsing habits and avoiding suspicious links.

Patching and Updates

Check the vendor's website for available patches.
Apply updates as soon as they are released to eliminate the vulnerability.