CVE-2020-12522

Command Injection Vulnerability in I/O-Check Service of WAGO PFC100, PFC200 and Touch Panel 600 Series with firmware versions <=FW10

Description

The reported vulnerability allows an attacker who has network access to the device to execute code with specially crafted packets in WAGO Series PFC 100 (750-81xx/xxx-xxx), Series PFC 200 (750-82xx/xxx-xxx), Series Wago Touch Panel 600 Standard Line (762-4xxx), Series Wago Touch Panel 600 Advanced Line (762-5xxx), Series Wago Touch Panel 600 Marine Line (762-6xxx) with firmware versions <=FW10.

Remediation

Solution:

  • The I/O-Check service protocol is only needed during installation and commissioning, not during normal operations. It is highly recommended to disable the I/O-Check service after commissioning. This is the easiest and securest way to protect your device from the listed vulnerabilities. Regardless to the action described above, the vulnerability has been fixed in FW11, released in December 2017.

Workaround:

  • Disable I/O-Check service Restrict network access to the device. Do not directly connect the device to the internet.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.18%
Third-Party Advisory vde.com
Affected: WAGO Series PFC 100 (750-81xx/xxx-xxx)
Affected: WAGO Series PFC 200 (750-82xx/xxx-xxx)
Affected: WAGO Series Wago Touch Panel 600 Standard Line (762-4xxx)
Affected: WAGO Series Wago Touch Panel 600 Advanced Line (762-5xxx)
Affected: WAGO Series Wago Touch Panel 600 Marine Line (762-6xxx)
Published at:
Updated at:

References

Link Tags
https://cert.vde.com/en-us/advisories/vde-2020-045 third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-12522?
CVE-2020-12522 has been scored as a critical severity vulnerability.
How to fix CVE-2020-12522?
To fix CVE-2020-12522: The I/O-Check service protocol is only needed during installation and commissioning, not during normal operations. It is highly recommended to disable the I/O-Check service after commissioning. This is the easiest and securest way to protect your device from the listed vulnerabilities. Regardless to the action described above, the vulnerability has been fixed in FW11, released in December 2017.
Is CVE-2020-12522 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-12522 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-12522?
CVE-2020-12522 affects WAGO Series PFC 100 (750-81xx/xxx-xxx), WAGO Series PFC 200 (750-82xx/xxx-xxx), WAGO Series Wago Touch Panel 600 Standard Line (762-4xxx), WAGO Series Wago Touch Panel 600 Advanced Line (762-5xxx), WAGO Series Wago Touch Panel 600 Marine Line (762-6xxx).
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