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.
Weakness
The product calls free() twice on the same memory address.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Pfc200_firmware | Wago | 03.02.02(14) (including) | 03.02.02(14) (including) |