3.3 Low
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.9 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
20.7%
CVSS v3 8.8
**ATTENTION:**Low skill level to exploit
**Vendor:**Emerson
**Equipment:**DeltaV Distributed Control System Workstations
**Vulnerability:**Authentication Bypass
Successful exploitation of this vulnerability could allow an attacker to shut down a service, resulting in a denial of service.
Emerson reports the vulnerability affects the following DeltaV Distributed Control System Workstations products:
3.2.1 AUTHENTICATION BYPASS CWE-307
A specially crafted script could bypass the authentication of a maintenance port of a service, which may allow an attacker to cause a denial of service.
CVE-2018-19021 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H).
Alexander Nochvay of Kaspersky Lab reported this vulnerability to Emerson.
Emerson recommends users to patch affected products listed below:
Software patches are available to users with access to the Emerson Guardian Support Portal at
<https://guardian.emersonprocess.com/>
For more information, please refer to the article for this vulnerability on the Emerson website.
To limit exposure to these and other vulnerabilities, Emerson recommends that DeltaV systems and related components be deployed and configured as described in the DeltaV Security Manual which can be found in Emersonβs Guardian Support Portal.
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability is exploitable from an adjacent network.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-19021
cwe.mitre.org/data/definitions/307.html
guardian.emersonprocess.com/
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Emerson%20DeltaV+https://www.cisa.gov/news-events/ics-advisories/icsa-19-010-01
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H
www.instagram.com/cisagov
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www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-19-010-01
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-010-01
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Emerson%20DeltaV&body=www.cisa.gov/news-events/ics-advisories/icsa-19-010-01
3.3 Low
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.9 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
20.7%