CVE-2021-45840 : What You Need to Know

Terramaster F4-210, F2-210 TOS 4.2.X (4.2.15-2107141517) allows for arbitrary command execution as root when manipulated through a specific input request.

Understanding CVE-2021-45840

This CVE entry highlights a critical vulnerability in Terramaster NAS devices that enables attackers to run commands with elevated privileges.

What is CVE-2021-45840?

The vulnerability in Terramaster F4-210, F2-210 TOS 4.2.X permits malicious actors to execute commands as the system's superuser by exploiting a particular input vector.

The Impact of CVE-2021-45840

Exploiting this security flaw can grant unauthorized access and control over the affected Terramaster NAS devices, leading to data theft, manipulation, or disruption of services.

Technical Details of CVE-2021-45840

This section delves into specific technical aspects of the vulnerability.

Vulnerability Description

The issue facilitates the execution of arbitrary commands with root privileges through a crafted input sent to /tos/index.php?app/app_start_stop in Terramaster F4-210, F2-210 TOS 4.2.X.

Affected Systems and Versions

Affected Systems: Terramaster F4-210, F2-210 with TOS 4.2.X (4.2.15-2107141517)
Affected Versions: n/a

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating input data sent to the specified URL, potentially gaining full control of the target system.

Mitigation and Prevention

Protecting systems from CVE-2021-45840 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply security patches or updates provided by Terramaster promptly.
Monitor network traffic for any suspicious activity targeting the vulnerable endpoint.
Restrict access to vulnerable systems and services.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential breaches.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Regularly check for security advisories and updates from Terramaster to address known vulnerabilities and strengthen system defenses.