Vulnerability identifier: #VU23634

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-5078

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wago PFC200 Controller
Hardware solutions / Firmware
WAGO PFC100 Controller
Hardware solutions / Firmware

Vendor: WAGO

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 and cause a denial of service condition, resulting in the device entering an error state where it ceases all network communications.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Wago PFC200 Controller: 03.00.39(12) - 03.01.07(13)

WAGO PFC100 Controller: 03.00.39(12)

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0870

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.