Vulnerability Details CVE-2019-5181
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 20.9%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 4.6
References
Products affected by CVE-2019-5181
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cpe:2.3:h:wago:pfc200:-
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cpe:2.3:o:wago:pfc200_firmware:03.02.02(14)