CVE-2021-44363 : 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, potentially leading to a system reboot when receiving a specially-crafted HTTP request.

Understanding CVE-2021-44363

This CVE highlights a denial of service vulnerability in a specific version of Reolink RLC-410W.

What is CVE-2021-44363?

The CVE identifies a vulnerability in the JSON command parser of the cgiserver.cgi module in the mentioned Reolink camera model. The flaw allows an attacker to trigger a system reboot using a crafted HTTP request.

The Impact of CVE-2021-44363

This vulnerability has been rated with a CVSS base score of 8.6, indicating a high severity issue. While it requires no privileges to exploit, it can result in a denial of service attack with significant impact on system availability.

Technical Details of CVE-2021-44363

This section outlines the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability resides in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102. By sending a specially-crafted HTTP request, an attacker can cause the device to reboot, affecting availability.

Affected Systems and Versions

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

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: High

Mitigation and Prevention

Understanding how to mitigate and prevent the impact of CVE-2021-44363 is crucial.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Implement network controls to restrict access to affected devices.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update firmware and software to address security vulnerabilities.
Conduct security assessments and penetration testing on IoT devices.

Patching and Updates

Check for firmware updates from Reolink.
Apply patches as soon as they are available to mitigate the vulnerability effectively.