CVE-2019-5182 : Vulnerability Insights and Analysis

WAGO PFC200 Firmware version 03.02.02(14) is affected by a stack buffer overflow vulnerability in the iocheckd service 'I/O-Check'. An attacker can exploit this issue by sending a specially crafted packet, leading to a service crash.

Understanding CVE-2019-5182

This CVE involves a critical vulnerability in the WAGO PFC200 device's firmware that can be exploited through a stack buffer overflow.

What is CVE-2019-5182?

The vulnerability in the iocheckd service of WAGO PFC200 Firmware version 03.02.02(14) allows an attacker to trigger a stack buffer overflow by sending a malicious packet.

The Impact of CVE-2019-5182

Exploiting this vulnerability can result in a service crash, potentially leading to denial of service or unauthorized access to the affected device.

Technical Details of CVE-2019-5182

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue 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

An attacker can exploit the vulnerability by sending a crafted packet to trigger the overflow in the destination buffer.
The overflow occurs when passing values greater than a specific length to the sprintf() function.
A type value of length 0x3d9 can cause the service to crash.

Mitigation and Prevention

Protecting systems from CVE-2019-5182 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and update firmware to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.

Patching and Updates

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