CVE-2021-40415 : What You Need to Know

This CVE-2021-40415 article provides insights into an incorrect default permission vulnerability in the cgiserver.cgi cgi_check_ability functionality of reolink RLC-410W v3.0.0.136_20121102.

Understanding CVE-2021-40415

CVE-2021-40415 involves an improper access control issue that could allow non-administrative users to format the SD card and reboot the device.

What is CVE-2021-40415?

An incorrect default permission vulnerability in reolink RLC-410W v3.0.0.136_20121102's cgiserver.cgi cgi_check_ability allows non-admin users to format the SD card and reboot the device.

The Impact of CVE-2021-40415

The vulnerability has a CVSS base score of 7.1, indicating a high severity level due to the possibility of non-administrative users manipulating device functions.

Technical Details of CVE-2021-40415

CVE-2021-40415's technical details are outlined below.

Vulnerability Description

The Format API in cgi_check_ability lacks specific cases, causing user permissions to default to 7, granting unauthorized users undue control.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited via network with low attack complexity, requiring low privileges and no user interaction.

Mitigation and Prevention

Learn how to mitigate and prevent risks associated with CVE-2021-40415.

Immediate Steps to Take

Apply vendor-provided patches promptly.
Restrict network access to the affected device.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Implement proper access controls and user permissions.

Patching and Updates

Regularly check for and apply security patches and updates provided by Reolink to address the vulnerability.