CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
92.1%
Successful exploitation of this vulnerability could allow an unauthenticated attacker to take administrative control of Unitronics Vision and Samba series systems and use a default administrative password.
The following Unitronics products are affected:
3.2.1 INITIALIZATION OF A RESOURCE WITH AN INSECURE DEFAULT CWE-1188
Unitronics Vision Series PLCs and HMIs use default administrative passwords. An unauthenticated attacker with network access to a PLC or HMI can take administrative control of the system.
CVE-2023-6448 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
See CISA KEV for more details.
CISA became aware of active exploitation for this vulnerability.
Unitronics has patched this vulnerability in VisiLogic version 9.9.00 and recommends all users update to the latest version. Please see Unitronics’ update log for more information.
For users who cannot update to the latest version, CISA urges organizations to:
CISA and WWS Sector partners have developed numerous tools and resources that water utilities can use to increase their cybersecurity. Please visit:
More information can be found by viewing the Unitronics advisory.
CISA has also provided further guidance in the following CSA.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:
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 on 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.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted 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.
Known public exploitations specifically targeting this vulnerability have been reported to CISA.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-6448
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-348-15
cwe.mitre.org/data/definitions/1188.html
downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdf
downloads.unitronicsplc.com/Sites/plc/Visilogic/Version_Changes-Bug_Reports/VisiLogic%209.9.00%20Version%20changes.pdf
github.com/cisagov/CSAF
https//www.cisa.gov/known-exploited-vulnerabilities-catalog
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Unitronics%20Vision%20and%20Samba%20Series%20%28Update%20A%29+https://www.cisa.gov/news-events/ics-advisories/icsa-23-348-15
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.awwa.org/Resources-Tools/Resource-Topics/Risk-Resilience/Cybersecurity-Guidance
www.cisa.gov/news-events/cybersecurity-advisories/aa23-335a
www.cisa.gov/resources-tools/resources/ics-recommended-practices
www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/water
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.epa.gov/waterriskassessment/epa-cybersecurity-water-sector
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-23-348-15
www.oig.dhs.gov/
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www.waterisac.org/resources
www.whitehouse.gov/
www.youtube.com/@cisagov
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