### [CVE-2019-5181](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5181)
![](https://img.shields.io/static/v1?label=Product&message=WAGO%20PFC200&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=stack%20buffer%20overflow&color=brighgreen)

### Description

An exploitable stack buffer overflow vulnerability vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 Firmware version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file. The destination buffer sp+0x440 is overflowed with the call to sprintf() for any subnetmask values that are greater than 1024-len(‘/etc/config-tools/config_interfaces interface=X1 state=enabled subnet-mask=‘) in length. A subnetmask value of length 0x3d9 will cause the service to crash.

### POC

#### Reference
- https://talosintelligence.com/vulnerability_reports/TALOS-2019-0963

#### Github
No PoCs found on GitHub currently.