CVE-2019-5156 Explained : Impact and Mitigation

A vulnerability in the cloud connectivity feature of WAGO PFC200 firmware versions 03.02.02(14), 03.01.07(13), and 03.00.39(12) allows unauthorized command injection, posing a security risk.

Understanding CVE-2019-5156

This CVE identifies a command injection vulnerability in specific versions of WAGO PFC200 firmware, potentially exploited by injecting commands into a parameter value.

What is CVE-2019-5156?

The vulnerability in WAGO PFC200 firmware versions 03.02.02(14), 03.01.07(13), and 03.00.39(12) enables attackers to inject commands into the TimeoutPrepared parameter within the firmware update command.

The Impact of CVE-2019-5156

Exploitation of this vulnerability could lead to unauthorized command execution, compromising the integrity and security of affected systems.

Technical Details of CVE-2019-5156

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows attackers to inject operating system commands into the TimeoutPrepared parameter value in the firmware update command of WAGO PFC200 firmware.

Affected Systems and Versions

Product: WAGO PFC200 Firmware
Vendor: Wago
Affected Versions: 03.02.02(14), 03.01.07(13), 03.00.39(12)

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious commands into the TimeoutPrepared parameter, potentially gaining unauthorized access and control.

Mitigation and Prevention

Protecting systems from CVE-2019-5156 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update affected firmware versions to patched releases promptly.
Implement network segmentation to limit exposure to potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.
Educate users and administrators on best security practices to enhance overall system security.

Patching and Updates

WAGO PFC200 users should apply the latest firmware updates provided by the vendor to mitigate the vulnerability effectively.