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). The destination buffer sp+0x440 is overflowed with the call to sprintf() for any domainname values that are greater than 1024-len(‘/etc/config-tools/edit_dns_server domain-name=‘) in length. A domainname value of length 0x3fa will cause the service to crash.
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