CVE-2019-5082 : Vulnerability Insights and Analysis

WAGO PFC200 Firmware versions 03.01.07(13), 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12) contain a heap buffer overflow vulnerability in the iocheckd service's I/O-Check functionality. Exploiting this vulnerability is possible by sending a carefully crafted set of packets, which can lead to a heap buffer overflow and potentially allow for code execution. Authentication is not required, as the attacker can trigger this vulnerability by sending unauthenticated packets.

Understanding CVE-2019-5082

This CVE identifies a heap buffer overflow vulnerability in specific firmware versions of WAGO PFC200 and PFC100 devices.

What is CVE-2019-5082?

CVE-2019-5082 is a security vulnerability found in WAGO PFC200 and PFC100 devices due to a heap buffer overflow in the iocheckd service's I/O-Check functionality.

The Impact of CVE-2019-5082

The vulnerability allows an attacker to execute arbitrary code by exploiting the heap buffer overflow without the need for authentication, posing a significant security risk to affected systems.

Technical Details of CVE-2019-5082

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability exists in the iocheckd service I/O-Check functionality of WAGO PFC200 Firmware versions 03.01.07(13), 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can trigger a heap buffer overflow.

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

Exploiting the vulnerability involves sending a specific set of packets to the affected devices, causing a heap buffer overflow that could lead to unauthorized code execution.

Mitigation and Prevention

Protecting systems from CVE-2019-5082 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Conduct security assessments and penetration testing.
Educate users and administrators on security best practices.

Patching and Updates

Regularly check for security updates and patches from the vendor to address the vulnerability effectively.