CVE-2019-5075 : What You Need to Know
Learn about CVE-2019-5075, a stack buffer overflow vulnerability in WAGO PFC200 and PFC100 firmware versions, allowing code execution via specially crafted packets. Find mitigation steps and prevention measures.
A vulnerability in the command line utility getcouplerdetails of WAGO PFC200 and PFC100 firmware versions allows for a stack buffer overflow, potentially leading to code execution when exploited by specially crafted packets.
Understanding CVE-2019-5075
This CVE involves a stack buffer overflow vulnerability in specific firmware versions of WAGO PFC200 and PFC100 devices.
What is CVE-2019-5075?
CVE-2019-5075 is a stack buffer overflow vulnerability found in the getcouplerdetails command line utility of WAGO PFC200 firmware versions 03.01.07(13) and 03.00.39(12), as well as WAGO PFC100 firmware version 03.00.39(12).
The Impact of CVE-2019-5075
The vulnerability can be exploited by sending specially designed packets to the iocheckd service, potentially allowing an attacker to execute arbitrary code on the affected devices.
Technical Details of CVE-2019-5075
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The vulnerability is a stack buffer overflow that occurs in the sub-process getcouplerdetails, triggered by unauthenticated packets sent by an attacker.
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
The overflow is caused by sending a specifically crafted set of packets to the iocheckd service "I/O-Check", leading to the execution of arbitrary code.
Mitigation and Prevention
To address CVE-2019-5075, follow these mitigation and prevention strategies.
Immediate Steps to Take
- Apply vendor-supplied patches or updates 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 best security practices.
Patching and Updates
Ensure that all affected devices are updated with the latest firmware versions provided by the vendor.