Buffer overflow in Wago Pfc200
CVE-2019-5177
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Wago Pfc200
- Wago Pfc200 Firmware — versions 03.02.02\(14\), 03.02.02(14)
- Wago Pfc200 — versions Firmware version 03.02.02(14)
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2019-0963 (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-5177?
- CVE-2019-5177 is a medium-severity vulnerability in Wago Pfc200, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2020-03-12.
- How severe is CVE-2019-5177?
- Medium severity. CVSS v3 base score is 5.5 out of 10.