CVE-2021-44379 : 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 by sending a specially-crafted HTTP request.

Understanding CVE-2021-44379

This CVE involves a denial of service vulnerability with a high impact.

What is CVE-2021-44379?

The vulnerability exists in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102, where a specific HTTP request can cause a reboot due to an improper handling of the command.

The Impact of CVE-2021-44379

The vulnerability has a base score of 8.6 (High) on the CVSSv3.0 scale, indicating a severe impact on the availability of the affected system, requiring no user interaction.

Technical Details of CVE-2021-44379

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in the cgiserver.cgi JSON command parser of reolink RLC-410W v3.0.0.136_20121102 allows an attacker to instigate a denial of service attack by sending a crafted HTTP request that triggers a reboot due to the mishandling of input.

Affected Systems and Versions

Vendor: Not applicable
Product: Not applicable
Version: reolink RLC-410W v3.0.0.136_20121102

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

To address CVE-2021-44379, follow these mitigation steps:

Immediate Steps to Take

Implement firewall rules to restrict access to the vulnerable service.
Apply network-level protection mechanisms to filter out potentially malicious requests.

Long-Term Security Practices

Regularly update and patch the firmware of the affected device.
Conduct security assessments and penetration testing to identify and remediate vulnerabilities.

Patching and Updates

Check for and apply any available patches or updates provided by the vendor to fix the vulnerability.