CVE-2021-40419 : Exploit Details and Defense Strategies

This article provides details about CVE-2021-40419, a firmware update vulnerability in reolink RLC-410W v3.0.0.136_20121102.

Understanding CVE-2021-40419

CVE-2021-40419 is a critical vulnerability that allows arbitrary firmware update through the 'factory' binary of reolink RLC-410W v3.0.0.136_20121102.

What is CVE-2021-40419?

The vulnerability in the 'factory' binary of reolink RLC-410W v3.0.0.136_20121102 enables an attacker to perform arbitrary firmware updates via a crafted series of network requests.

The Impact of CVE-2021-40419

The impact of CVE-2021-40419 is critical with a CVSS base score of 10. The vulnerability affects confidentiality, integrity, and availability of the system with no privileges required for exploitation.

Technical Details of CVE-2021-40419

CVE-2021-40419 is classified under the following technical details:

Vulnerability Description

This vulnerability allows an attacker to trigger arbitrary firmware updates by sending a sequence of network requests.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited through network requests, requiring low attack complexity and no user interaction.

Mitigation and Prevention

To mitigate CVE-2021-40419, consider the following:

Immediate Steps to Take

Update to a patched firmware version.
Restrict network access to vulnerable devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software.
Conduct security assessments and penetration testing.

Patching and Updates

Apply security patches released by the vendor.
Stay informed about security advisories and updates.