9.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
0.0005 Low
EPSS
Percentile
18.0%
Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service condition or gain unauthorized access to data or control of the device.
The following products are affected:
The Series 1 ROC800 and DL8000 became obsolete in 2008 when the Series 2 was introduced.
3.2.1 Authentication Bypass By Primary Weakness CWE-305
ROC800-Series RTU devices are vulnerable to an authentication bypass, which could allow an attacker to gain unauthorized access to data or control of the device and cause a denial-of-service condition.
CVE-2023-1935 has been assigned to this vulnerability. A CVSS v3 base score of 9.4 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H).
Emerson reported this vulnerability to CISA.
Emerson ROC800-Series RTU firmware updates can be applied to patch the authentication vulnerability:
Before installing firmware into the RTU, validate the MD5/SHA256 Hashes published by Emerson on SupportNet match the firmware image confirming it is genuine and unmodified.
Emerson recommends users follow guidance in the ROC800-Series Remote Operations Controller Instruction Manual under section 1.11 Secure Gateway D301766X012.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best 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 webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-1935
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/305.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
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:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
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www.oig.dhs.gov/
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www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
www3.emersonprocess.com/remote/support/v3/main.html
www3.emersonprocess.com/remote/support/v3/main.html
www3.emersonprocess.com/remote/support/v3/main.html
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