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). 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 ip values that are greater than 1024-len(‘/etc/config-tools/config_interfaces interface=X1 state=enabled ip-address=‘) in length. A ip value of length 0x3da will cause the service to crash.
References (1)
Core 1
Core References
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0963
Scores
CVSS v3
7.8
EPSS
0.0066
EPSS Percentile
47.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (1)
wago/pfc200_firmware
03.02.02\(14\)
Published
Mar 12, 2020
Tracked Since
Feb 18, 2026