CVE-2019-5077 : Vulnerability Insights and Analysis

A vulnerability in the iocheckd service functionality of WAGO PFC 200 and PFC 100 firmware versions can lead to a denial-of-service attack.

Understanding CVE-2019-5077

This CVE involves a denial-of-service vulnerability in specific firmware versions of WAGO PFC devices.

What is CVE-2019-5077?

The vulnerability in the iocheckd service of WAGO PFC 200 firmware versions 03.01.07(13) and 03.00.39(12), as well as WAGO PFC 100 firmware version 03.00.39(12), allows attackers to trigger a denial-of-service attack without authentication.

The Impact of CVE-2019-5077

Exploiting this vulnerability can cause the affected device to enter an error state, resulting in a complete halt in all network communications.

Technical Details of CVE-2019-5077

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in the iocheckd service of WAGO PFC devices can be exploited by sending a carefully crafted set of packets to trigger a denial-of-service condition.

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 specially crafted packets to the affected devices, causing them to cease all network communications.

Mitigation and Prevention

Protecting systems from CVE-2019-5077 is crucial to maintaining network security.

Immediate Steps to Take

Apply vendor-supplied patches promptly.
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 mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Regularly check for firmware updates and security advisories from the vendor to apply patches that address the CVE.