Vulnerability identifier: #VU26274

Vulnerability risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-5149

CWE-ID: N/A

Exploitation vector: Network

Exploit availability: No

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

Vendor: WAGO

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists within the Web-Based Management (WBM) due to the default configuration of the FastCGI module appears to limit the number of concurrent php-cgi processes to two. A remote attacker can trigger resource exhaustion and cause a denial of service condition on the target webserver. 

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

Vulnerable software versions

WAGO PFC100 Controller: 03.00.39(12) - 03.02.02(14)

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

---

External links
http://talosintelligence.com/vulnerability_reports/TALOS-2019-0939

---

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.