CVE-2019-5184 : Exploit Details and Defense Strategies

The WAGO PFC 200 device is affected by a double-free vulnerability in its iocheckd service, potentially leading to denial of service and code execution.

Understanding CVE-2019-5184

This CVE involves a vulnerability in the WAGO PFC 200 device that can be exploited through a specially crafted XML cache file.

What is CVE-2019-5184?

The vulnerability in the iocheckd service of the WAGO PFC 200 device allows for a double-free scenario, triggered by parsing a malicious XML cache file.

The Impact of CVE-2019-5184

The exploitation of this vulnerability can result in denial of service and potentially enable attackers to execute malicious code on the device.

Technical Details of CVE-2019-5184

The technical aspects of the vulnerability in the WAGO PFC 200 device.

Vulnerability Description

The vulnerability involves a double-free issue in the iocheckd service of the WAGO PFC 200 device.
Triggered by parsing a specially crafted XML cache file placed in a specific location on the device.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a specifically crafted packet to the device.

Mitigation and Prevention

Measures to mitigate and prevent the exploitation of CVE-2019-5184.

Immediate Steps to Take

Apply vendor-supplied patches or updates to address the vulnerability.
Implement network segmentation to limit access to vulnerable devices.
Monitor network traffic for any signs of exploitation attempts.

Long-Term Security Practices

Regularly update firmware and software on all devices to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

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