CVE-2019-5073 : Security Advisory and Response

A vulnerability in the iocheckd service "I/O-Check" function of WAGO PFC200 and PFC100 firmware versions allows for information exposure through carefully crafted packets.

Understanding CVE-2019-5073

This CVE involves an information exposure vulnerability in specific firmware versions of WAGO PFC200 and PFC100 devices.

What is CVE-2019-5073?

The vulnerability in the iocheckd service of WAGO PFC200 and PFC100 firmware versions enables attackers to expose information by manipulating packet data.

The Impact of CVE-2019-5073

Exploiting this vulnerability can lead to uninitialized stack data being copied into response packet buffers, potentially compromising sensitive information.

Technical Details of CVE-2019-5073

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows attackers to trigger information exposure by sending unauthorized packets to the affected devices.

Affected Systems and Versions

WAGO PFC200 Firmware version 03.01.07(13)
WAGO PFC200 Firmware version 03.00.39(12)
WAGO PFC100 Firmware version 03.00.39(12)

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a carefully crafted set of packets, causing an external tool to malfunction and exposing sensitive data.

Mitigation and Prevention

Protecting systems from CVE-2019-5073 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by the vendor promptly.
Monitor network traffic for any suspicious activities.
Implement access controls to restrict unauthorized access.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Stay informed about security advisories from the vendor.
Implement a robust patch management process to ensure timely updates and fixes.