CVE-2019-5160 Server-side request forgery in WAGO PFC200 Firmware

Critical 9.1 Published 10 Mar 2020 Updated 4 Aug 2024

An attacker can send a crafted HTTPS request to force the device to connect to an unauthorized host, bypassing host validation and accessing firmware update functionality.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-5160?

CVE-2019-5160 is a critical server-side request forgery vulnerability in WAGO PFC200 Firmware, published on 10 Mar 2020. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An exploitable improper host validation vulnerability exists in the Cloud Connectivity functionality of WAGO PFC200 Firmware versions 03.02.02(14), 03.01.07(13), and 03.00.39(12). A specially crafted HTTPS POST request can cause the software to connect to an unauthorized host, resulting in unauthorized access to firmware update functionality. An attacker can send an authenticated HTTPS POST request to direct the Cloud Connectivity software to connect to an attacker controlled Azure IoT Hub node.

Which versions are affected by CVE-2019-5160?

It affects 1 product.

Products include Wago Pfc200 Firmware.

How do I fix CVE-2019-5160?

No fix has been published for CVE-2019-5160 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2019-5160 being exploited?

There is no known exploitation of CVE-2019-5160 in the wild and no public exploit code.

Sources

Also known as GHSA-7626-8jvh-h9mq.