Auth bypass in Wago Pfc 100
CVE-2019-5077
An exploitable denial-of-service vulnerability exists in the iocheckd service ‘’I/O-Chec’’ functionality of WAGO PFC 200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC 100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a denial of service, resulting in the device entering an error state where it ceases all network communications. An attacker can send unauthenticated packets to trigger this vulnerability.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (76.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Wago Pfc 100
- Wago Pfc 100 Firmware — versions 03.00.39(12), 03.00.39\(12\)
- Wago Pfc 200
- Wago Pfc 200 Firmware — versions 03.01.07(13), 03.00.39(12), 03.01.07\(13\)
- Wago Pfc100 — versions Firmware version 03.00.39(12)
- Wago Pfc200 — versions Firmware version 03.01.07(13), Firmware version 03.00.39(12)
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2019-0869 (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-5077?
- CVE-2019-5077 is a critical-severity vulnerability in Wago Pfc 100, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2019-12-18.
- How severe is CVE-2019-5077?
- Critical severity. CVSS v3 base score is 9.1 out of 10.