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.
[
{
"product": "Wago",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "WAGO PFC200 Firmware version 03.02.02(14)"
}
]
}
]