CVE-2019-5177

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-03-12 · updated 2026-06-17
Weakness: CWE-787

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

WAGO PFC200: 03.02.02(14)

References

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

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