Description
An exploitable double free vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. A specially crafted XML cache file written to a specific location on the device can cause a heap pointer to be freed twice, resulting in a denial of service and potentially code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Wago | WAGO PFC200 Firmware version 03.02.02(14) | — |
Advisories 1
- VDE-2020-011 WAGO: Multiple Vulnerabilities in I/O-Check Service CERT@VDE · May 22, 2025