Auth bypass in Emerson Deltav Distributed Control System
CVE-2022-29957
The Emerson DeltaV Distributed Control System (DCS) through 2022-04-29 mishandles authentication. It utilizes several proprietary protocols for a wide variety of functionality. These protocols include Firmware upgrade (18508/TCP, 18518/TCP); Plug-and-Play (18510/UDP); Hawk services (18507/UDP); Management (18519/TCP); Cold restart (18512/UDP); SIS communications (12345/TCP); and Wireless Gateway Protocol (18515/UDP). None of these protocols have any authentication features, allowing any attacker capable of communicating with the ports in question to invoke (a subset of) desired functionality.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (11.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.forescout.com/blog/ (Third Party Advisory)
- www.cisa.gov/uscert/ics/advisories/icsa-22-181-03 (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-29957?
- CVE-2022-29957 is a high-severity vulnerability in Emerson Deltav Distributed Control System, classified under Missing Authentication for Critical Function. CVSS score: 7.8/10. Published 2022-07-26.
- How severe is CVE-2022-29957?
- High severity. CVSS v3 base score is 7.8 out of 10.