Vulnerability identifier: #VU26273

Vulnerability risk: Medium

CVSSv3.1: 5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-5134

CWE-ID: CWE-777

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 gain access to potentially sensitive information.

The vulnerability exists due to the regular expression without anchors issue in the Web-Based Management (WBM) authentication functionality. A remote attacker can use a specially crafted authentication request to bypass regular expression filters and gain access to sensitive information on the target 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://talosintelligence.com/vulnerability_reports/TALOS-2019-0923

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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. However, proof of concept for this vulnerability is available.