CVE-2019-5170 : What You Need to Know

The WAGO PFC 200 Firmware version 03.02.02(14) is vulnerable to a command injection issue in the 'I/O-Check' function of the iocheckd service, allowing attackers to execute arbitrary OS commands.

Understanding CVE-2019-5170

This CVE involves a command injection vulnerability in the WAGO PFC 200 Firmware version 03.02.02(14).

What is CVE-2019-5170?

The vulnerability allows attackers to manipulate an XML cache file to inject OS commands, leading to the execution of unauthorized commands on the affected device.

The Impact of CVE-2019-5170

Exploitation of this vulnerability can result in unauthorized access, data theft, system compromise, and potential disruption of critical operations.

Technical Details of CVE-2019-5170

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The vulnerability lies in the 'I/O-Check' function of the iocheckd service in the WAGO PFC 200 Firmware version 03.02.02(14), allowing for command injection through manipulation of an XML cache file.

Affected Systems and Versions

Product: WAGO PFC200
Vendor: Wago
Firmware version: 03.02.02(14)

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a customized packet to trigger parsing of the manipulated XML cache file.
The hostname value extracted from the XML file is used to modify the hostname via the sprintf() function, leading to the execution of unauthorized commands.

Mitigation and Prevention

To address CVE-2019-5170, consider the following mitigation strategies:

Immediate Steps to Take

Apply vendor-supplied patches or updates to fix the vulnerability.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software to ensure the latest security patches are in place.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories from the vendor and promptly apply recommended patches to secure the system.