CVE-2018-17208 : Security Advisory and Response

Linksys Velop 1.1.2.187020 devices are vulnerable to unauthenticated command injection, allowing attackers to gain full root access. The vulnerability can be exploited through specific scripts in the firmware, leading to potential CSRF attacks.

Understanding CVE-2018-17208

This CVE involves a critical security flaw in Linksys Velop 1.1.2.187020 devices that can be exploited by attackers to execute unauthorized commands and obtain complete control over the affected devices.

What is CVE-2018-17208?

The vulnerability in Linksys Velop 1.1.2.187020 devices allows attackers to execute commands without authentication, granting them complete root access. The flaw stems from the mishandling of shell metacharacters in the query string by ShellExecute.

The Impact of CVE-2018-17208

The exploitation of this vulnerability can lead to severe consequences:

Unauthorized execution of commands
Complete control over the affected devices
Potential for CSRF attacks

Technical Details of CVE-2018-17208

Linksys Velop 1.1.2.187020 devices are susceptible to the following:

Vulnerability Description

Attackers can exploit the vulnerability through cgi-bin/zbtest.cgi or cgi-bin/zbtest2.cgi scripts found in the firmware.
The flaw arises due to mishandling of shell metacharacters in the query string by ShellExecute.
Demonstrated vulnerability through the zbtest.cgi?cmd=level&level= substring.

Affected Systems and Versions

Product: Linksys Velop 1.1.2.187020
Vendor: Linksys
Version: 1.1.2.187020

Exploitation Mechanism

Attackers can leverage the vulnerability through specific scripts in the firmware, enabling unauthorized command execution and potential CSRF attacks.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2018-17208:

Immediate Steps to Take

Disable remote access to the affected devices if not required.
Monitor network traffic for any suspicious activity.
Implement strong firewall rules to restrict unauthorized access.

Long-Term Security Practices

Regularly update firmware to patch known vulnerabilities.
Conduct security audits to identify and address potential weaknesses.
Educate users on safe browsing habits and security best practices.

Patching and Updates

Check for firmware updates provided by Linksys to address the CVE-2018-17208 vulnerability.
Apply patches promptly to ensure the security of the devices.