Vulnerability identifier: #VU23635

Vulnerability risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-5079

CWE-ID: CWE-119

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the iocheckd service "I/O-Check" functionality within the ReadPSN message processing code. A remote attacker can send a specially crafted set of packets, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

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-2019-0871

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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.