Auth bypass in Honeywell Experion Lx
CVE-2022-30317
Honeywell Experion LX through 2022-05-06 has Missing Authentication for a Critical Function. According to FSCT-2022-0055, there is a Honeywell Experion LX Control Data Access (CDA) EpicMo protocol with unauthenticated functionality issue. The affected components are characterized as: Honeywell Control Data Access (CDA) EpicMo (55565/TCP). The potential impact is: Firmware manipulation, Denial of service. The Honeywell Experion LX Distributed Control System (DCS) utilizes the Control Data Access (CDA) EpicMo protocol (55565/TCP) for device diagnostics and maintenance purposes. This protocol does not have any authentication features, allowing any attacker capable of communicating with the ports in question to invoke (a subset of) desired functionality. There is no authentication functionality on the protocol in question. An attacker capable of invoking the protocols' functionalities could issue firmware download commands potentially allowing for firmware manipulation and reboot devices causing denial of service.
Vulnerability class: Broken Authentication
EPSS: 0.007 (51.1th 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
- Honeywell Experion_lx
- Honeywell Experion_lx_firmware
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_MISC, Not Applicable)
- cve@mitre.org (US Government Resource, Third Party Advisory, x_refsource_MISC, Mitigation)
Frequently asked questions
- What is CVE-2022-30317?
- CVE-2022-30317 is a critical-severity vulnerability in Honeywell Experion Lx, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2022-08-31.
- How severe is CVE-2022-30317?
- Critical severity. CVSS v3 base score is 9.1 out of 10.