CVE-2021-40409 : Exploit Details and Defense Strategies

This CVE-2021-40409 article provides insights into an OS command injection vulnerability found in reolink RLC-410W v3.0.0.136_20121102 affecting network settings functionality.

Understanding CVE-2021-40409

This section delves deeper into the details of the CVE-2021-40409 vulnerability.

What is CVE-2021-40409?

The OS command injection vulnerability in the device network settings of Reolink RLC-410W v3.0.0.136_20121102 allows attackers to execute arbitrary commands through the ddns->password variable, leading to severe consequences.

The Impact of CVE-2021-40409

The vulnerability has a CVSS base score of 9.1 (Critical) with high availability, confidentiality, and integrity impacts. Attack complexity is low with high privileges required.

Technical Details of CVE-2021-40409

Explore the technical aspects of CVE-2021-40409 below.

Vulnerability Description

The flaw arises due to improper validation of the ddns->password variable, enabling malicious OS command injection via the SetDdns API.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability allows threat actors to inject OS commands via the ddns->password variable, leading to arbitrary command execution.

Mitigation and Prevention

Discover how to mitigate the CVE-2021-40409 vulnerability below.

Immediate Steps to Take

Disable remote access if not needed
Implement strong password policies
Monitor network traffic for suspicious activities

Long-Term Security Practices

Regular security training for employees
Keep systems updated with the latest patches

Patching and Updates

Ensure timely installation of vendor-supplied patches and updates to address the vulnerability.