CVE-2021-45733 : Security Advisory and Response

TOTOLINK X5000R v9.1.0u.6118_B20201102 contains a command injection vulnerability in the function NTPSyncWithHost, allowing attackers to execute arbitrary commands.

Understanding CVE-2021-45733

This CVE involves a command injection vulnerability in a specific function of the TOTOLINK X5000R router.

What is CVE-2021-45733?

The vulnerability in TOTOLINK X5000R v9.1.0u.6118_B20201102 enables attackers to run arbitrary commands through a specific parameter.

The Impact of CVE-2021-45733

Attackers can exploit this vulnerability to execute unauthorized commands on the affected device, potentially leading to further compromise or unauthorized access.

Technical Details of CVE-2021-45733

The technical specifics of this CVE are as follows:

Vulnerability Description

A command injection vulnerability exists in the NTPSyncWithHost function of TOTOLINK X5000R v9.1.0u.6118_B20201102.

Affected Systems and Versions

Product: TOTOLINK X5000R
Version: v9.1.0u.6118_B20201102

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the host_time parameter to execute malicious commands.

Mitigation and Prevention

Immediate steps to secure against CVE-2021-45733 include:

Immediate Steps to Take

Disable remote access if not required
Implement network segmentation to limit exposure
Regularly monitor and audit device logs for suspicious activity

Long-Term Security Practices

Keep devices updated with the latest firmware
Conduct regular security assessments and penetration testing
Educate users on safe practices and security awareness

Patching and Updates

Check vendor updates for security patches and apply them promptly to fix the vulnerability