Kelly Leuschner of Cisco Talos discovered these vulnerabilities. Blog by Jon Munshaw.
The WAGO PFC200 and PFC100 controllers contain multiple exploitable vulnerabilities. The PFC200 is one of WAGO’s programmable automation controllers that are used in many industries including automotive, rail, power engineering, manufacturing and building management. The vulnerabilities disclosed here all have their root cause within the protocol handling code of the I/O Check (iocheckd) configuration service used by the controllers. The vulnerabilities discussed here could allow an attacker to remotely execute code, deny service to the device or weaken device login credentials.In accordance with our coordinated disclosure policy, Cisco Talos worked with WAGO to ensure that these issues are resolved and that an update is available for affected customers.
Vulnerability details
WAGO PFC200 iocheckd service "I/O-Check" external tool information exposure vulnerability (TALOS-2019-0862/CVE-2019-5073)
An exploitable information exposure vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. A specially crafted set of packets can cause an external tool to fail, resulting in uninitialized stack data to be copied to the response packet buffer. An attacker can send unauthenticated packets to trigger this vulnerability.
Read the complete vulnerability advisory here for additional information.
WAGO PFC200 iocheckd service "I/O-Check" BC_ProductLabel remote code execution vulnerability (TALOS-2019-0863/CVE-2019-5074)
An exploitable stack buffer overflow vulnerability exists in the iocheckd service "I/O- ..
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