CVE-2021-44414 : 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, allowing an attacker to trigger a reboot via a specially-crafted HTTP request.

Understanding CVE-2021-44414

This CVE involves a denial of service vulnerability in a specific version of Reolink security cameras.

What is CVE-2021-44414?

The vulnerability exists in the JSON command parser of Reolink RLC-410W v3.0.0.136_20121102, where a malicious HTTP request can cause the device to reboot.

The Impact of CVE-2021-44414

This vulnerability has a CVSS base score of 8.6 (High severity) and can lead to a denial of service condition, impacting the availability of the affected system.

Technical Details of CVE-2021-44414

This section covers specific technical details of the CVE.

Vulnerability Description

The issue arises due to a flaw in the cgiserver.cgi JSON command parser, allowing an attacker to send a crafted HTTP request and trigger a reboot.

Affected Systems and Versions

Affected system: reolink RLC-410W v3.0.0.136_20121102
Affected versions: None specified

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

Steps to mitigate and prevent exploitation of CVE-2021-44414.

Immediate Steps to Take

Update to a patched version provided by the vendor.
Restrict network access to vulnerable devices.
Monitor network traffic for suspicious activity.

Long-Term Security Practices

Regularly update firmware and software of connected devices.
Implement network segmentation to isolate critical systems.
Conduct security assessments and penetration testing.

Patching and Updates

Ensure timely application of vendor-provided patches and updates to address the vulnerability.