CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
18.1%
CVSS v3 8.8
ATTENTION: Exploitable from an adjacent network/low skill level to exploit
Vendor: ABB
Equipment: CMS-770
Vulnerabilities: Improper Authentication
Successful exploitation of this vulnerability may allow an attacker to read sensitive configuration files that may lead to code execution on the device.
The following versions of CMS-770, from ABB and Busch-Jaeger brands, are affected:
An attacker can read sensitive configuration files by bypassing the user authentication mechanism.
CVE-2018-17928 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:U/C:H/I:H/A:H).
Maxim Rupp (RuppIT) working with ABB reported this vulnerability to NCCIC.
ABB recommends installing the device in accordance with the latest instructions from the updated technical manual. For additional information, refer to ABB’s security notification ABBVU-EPBP-R-5673 and the product user [manual](<https://library.e.abb.com/public/adcab406985b4510836d4b94490ad953/2CCC481007M0201_User Manual.pdf>).
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-12-146-01B–Targeted 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.
search-ext.abb.com/library/Download.aspx?DocumentID=ABBVU-EPBP-R-5673&LanguageCode=en&DocumentPartId=2CKA008100A0351%3B%202CCA688307R0001&Action=Launch
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-17928
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-352-06
cwe.mitre.org/data/definitions/287.html
library.e.abb.com/public/adcab406985b4510836d4b94490ad953/2CCC481007M0201_User Manual.pdf
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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mailto:?subject=ABB%20CMS-770&body=www.cisa.gov/news-events/ics-advisories/icsa-18-352-06
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
18.1%