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The reported vulnerability allows an attacker who has network access to the device to execute code with specially crafted packets.
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.
By exploiting the described vulnerabilities the attacker potentially is able to manipulate or disrupt the device.
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.
This vulnerability was originally found by Florian Seidel of WAGO and was rediscovered by Uri Katz of Claroty.