CVE-2021-43663 : Security Advisory and Response

This CVE involves a command injection vulnerability in totolink EX300_v2 V4.0.3c.140_B20210429 through the component cloudupdate_check.

Understanding CVE-2021-43663

This CVE details a specific vulnerability in the totolink EX300_v2 router.

What is CVE-2021-43663?

The vulnerability allows attackers to inject arbitrary commands via cloudupdate_check on the affected router.

The Impact of CVE-2021-43663

The exploit could lead to unauthorized access, data leakage, or complete control of the affected device.

Technical Details of CVE-2021-43663

This section provides a deeper look into the technical aspects of the CVE.

Vulnerability Description

A command injection vulnerability exists in totolink EX300_v2 V4.0.3c.140_B20210429 through cloudupdate_check.

Affected Systems and Versions

Product: totolink EX300_v2
Version: V4.0.3c.140_B20210429

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious commands through the cloudupdate_check component.

Mitigation and Prevention

Protect your systems from CVE-2021-43663 by following the below measures.

Immediate Steps to Take

Disable cloudupdate_check if not essential
Monitor network traffic for suspicious activities
Implement strong access control measures

Long-Term Security Practices

Regularly update firmware and security patches
Conduct security audits and penetration testing

Patching and Updates

Apply manufacturer-recommended patches and updates to mitigate the vulnerability.