CVE-2021-42884 : Exploit Details and Defense Strategies

TOTOLINK EX1200T V4.1.2cu.5215 contains a remote command injection vulnerability that allows attackers to control the deviceName to launch attacks.

Understanding CVE-2021-42884

This CVE involves a remote command injection vulnerability in the TOTOLINK EX1200T V4.1.2cu.5215.

What is CVE-2021-42884?

The vulnerability exists in the setDeviceName function of the file global.so, enabling attackers to manipulate the deviceName for malicious purposes.

The Impact of CVE-2021-42884

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

Technical Details of CVE-2021-42884

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows remote command injection through the setDeviceName function of global.so in the TOTOLINK EX1200T V4.1.2cu.5215, facilitating unauthorized control over the device's name.

Affected Systems and Versions

Product: TOTOLINK EX1200T V4.1.2cu.5215
Vendor: TOTOLINK
Version: V4.1.2cu.5215

Exploitation Mechanism

By manipulating the deviceName parameter via the setDeviceName function, threat actors can execute arbitrary commands and compromise the device.

Mitigation and Prevention

To safeguard against CVE-2021-42884, follow these mitigation strategies:

Immediate Steps to Take

Disable remote access if not needed.
Apply vendor-supplied patches promptly.
Implement network segmentation to limit the attack surface.

Long-Term Security Practices

Regularly update firmware to patch known vulnerabilities.
Conduct security assessments to identify and address weak points.

Patching and Updates

Check the vendor's official website for security patches and updates to address the CVE-2021-42884 vulnerability.