Missing Authentication for Critical Function in Wago PFC200 Controller and WAGO PFC100 Controller - CVE-2019-5077
Published: December 17, 2019
Vulnerability identifier: #VU23639
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-5077
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: WAGO
Affected software:
Wago PFC200 Controller
WAGO PFC100 Controller
Wago PFC200 Controller
WAGO PFC100 Controller
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an insufficient authentication mechanism in the iocheckd service "I/O-Check" functionality. A remote attacker can send a specially crafted set of packets which will overwrite the MAC Address stored persistently on the device, cause a denial of service, resulting in the device entering an error state where it ceases all network communications.
How to mitigate CVE-2019-5077
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.