CVE-2019-5180 : What You Need to Know

A security flaw in the iocheckd service 'I/O-Check' in WAGO PFC200 Firmware version 03.02.02(14) allows for a stack buffer overflow vulnerability that can be exploited by a specially crafted packet.

Understanding CVE-2019-5180

This CVE involves a vulnerability in the WAGO PFC200 device's firmware that can be triggered through malicious packet manipulation.

What is CVE-2019-5180?

The vulnerability in the iocheckd service of WAGO PFC200 Firmware version 03.02.02(14) enables attackers to cause a stack buffer overflow by sending a specific packet, leading to a service crash.

The Impact of CVE-2019-5180

The exploitation of this vulnerability can result in a denial of service (DoS) condition, potentially disrupting the normal operation of the affected device.

Technical Details of CVE-2019-5180

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from a stack buffer overflow in the iocheckd service of WAGO PFC200 Firmware version 03.02.02(14) when processing specially crafted packets.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers exploit the vulnerability by sending a crafted packet to trigger the parsing of a cache file, causing a stack buffer overflow in the destination buffer.
The overflow occurs when the sprintf() function is called with an IP value longer than the specified length.
A specific IP value length can lead to a service crash.

Mitigation and Prevention

Protecting systems from CVE-2019-5180 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply vendor-supplied patches or updates to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update firmware and software to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.
Educate users and administrators about safe practices to prevent exploitation.

Patching and Updates

Stay informed about security advisories and updates from the vendor.
Promptly apply patches and firmware updates to ensure the system is protected against known vulnerabilities.