CVE-2021-40407 : Vulnerability Insights and Analysis

An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. This vulnerability could allow an attacker to execute arbitrary OS commands by manipulating the ddns->domain variable.

Understanding CVE-2021-40407

This CVE involves an OS command injection vulnerability in Reolink RLC-410W devices, potentially leading to critical impacts if exploited.

What is CVE-2021-40407?

CVE-2021-40407 is an OS command injection vulnerability in the device network settings of the Reolink RLC-410W v3.0.0.136_20121102. The issue arises due to improper validation of the ddns->domain parameter, enabling attackers to execute malicious commands.

The Impact of CVE-2021-40407

The vulnerability has a CVSS base score of 9.1, categorizing it as critical. The potential impacts include high confidentiality, integrity, and availability risks, with high privileges required for exploitation.

Technical Details of CVE-2021-40407

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability stems from improper neutralization of special elements in OS commands, allowing threat actors to inject and execute arbitrary commands.

Affected Systems and Versions

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

Exploitation Mechanism

To exploit the vulnerability, an attacker can send a crafted HTTP request to manipulate the ddns->domain variable and execute unauthorized OS commands.

Mitigation and Prevention

To address CVE-2021-40407, follow these mitigation steps:

Immediate Steps to Take

Disable any unnecessary network services on the affected device.
Implement proper input validation and sanitization techniques.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Keep devices up to date with the latest firmware versions.
Conduct regular security audits and penetration testing.
Educate users on safe browsing habits and cybersecurity best practices.

Patching and Updates

Check the vendor's website for security advisories and patches related to this vulnerability.