CVE-2019-5172 : Vulnerability Insights and Analysis

A potential vulnerability in the 'I/O-Check' function of the WAGO PFC 200 Firmware version 03.02.02(14) has been identified, allowing for command injection. An attacker could exploit this flaw to execute arbitrary commands by manipulating the parsing of a cache file.

Understanding CVE-2019-5172

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

What is CVE-2019-5172?

The vulnerability allows an attacker to inject commands through specially crafted packets, exploiting the parsing of a cache file in the iocheckd service.

The Impact of CVE-2019-5172

An attacker can execute arbitrary commands on the affected system.
No restriction on the number of commands that can be injected, posing a severe security risk.

Technical Details of CVE-2019-5172

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability lies in the 'I/O-Check' function of the WAGO PFC 200 Firmware version 03.02.02(14), allowing for command injection through crafted packets.

Affected Systems and Versions

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

Exploitation Mechanism

Attacker sends a specially crafted packet to trigger parsing of a cache file.
NTP value from the XML file is used as an argument for executing arbitrary commands.
The command is executed through a system() call without limitations on the number of entries.

Mitigation and Prevention

Protecting systems from CVE-2019-5172 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates to fix the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential attacks.
Regularly update and patch all software and firmware to prevent vulnerabilities.

Patching and Updates

Regularly check for security advisories from the vendor and apply patches promptly to secure the system.