Auth bypass in Wago Pfc 100
CVE-2019-5078
An exploitable denial of service vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC100 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
EPSS: 0.017 (75.3th percentile) — read the EPSS interpretation.
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.
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\(13\)
- N/a Wago Pfc100 — versions Firmware version 03.00.39(12)
- N/a Wago Pfc200 — versions Firmware version 03.01.07(13), Firmware version 03.00.39(12)
Weakness classification (CWE)
References
- talos-cna@cisco.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2019-5078?
- CVE-2019-5078 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-2019-5078?
- Critical severity. CVSS v3 base score is 9.1 out of 10.