Rockwell Automation FLEX 5000 I/O Module Fault Vulnerability in CIP Class 32 Handling

A vulnerability exists in the Rockwell Automation FLEX 5000 I/O 5094-IY8 device due to improper management of requests related to CIP Class 32 when the module is inhibited. This mismanagement causes the module to enter a fault state, indicated by a flashing red LED. Once the module is un-inhibited, it returns a connection fault (Code 16#0010) and cannot recover without a power cycle.

Impact

The vulnerability causes the affected module to enter a fault state, with the Module LED flashing red. After being un-inhibited, the module experiences a connection fault (Code 16#0010) and requires a power cycle to recover.

Remediation

Users should update to version 2.012 or later. If an upgrade is not possible, security best practices should be applied.