5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.5 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%
Successful exploitation of this vulnerability could allow a remote attacker to add content to the log file.
The following versions of OPC UA Server Toolkit, OPC library designed to allow creation of OPC DA, DX and HDA servers software, are affected:
OPCUAServerToolkit will write a log message once an OPC UA client has successfully connected containing the client’s self-defined description field.
CVE-2023-7234 has been assigned to this vulnerability. A CVSS v3.1 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).
Sam Hanson of Dragos reported this vulnerability to CISA.
Integration Objects has released a security fix (version 1.0.0 fix 20240123) of the OPC UA Server Toolkit aimed at mitigating potential risks of the vulnerability. The security fix is available to all users of the OPC UA Server Toolkit demo version. The full version of the security fix is available for users who acquired the full version of the toolkit and have valid support contracts. These customers are invited to contact the Integration Objects sales team to check their support contract status and access to the full version of the security fix.
Integration Objects published a news update on their website
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.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-7234
cwe.mitre.org/data/definitions/117.html
github.com/cisagov/CSAF
integrationobjects.com/company/news-events/release-of-security-fix-for-vulnerability-identified-in-opc-ua-server-toolkit/
integrationobjects.com/sioth-opc/sioth-opc-unified-architecture/opc-ua-server-toolkit/
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Integration%20Objects%20OPC%20UA%20Server%20Toolkit%20%28Update%20A%29+https://www.cisa.gov/news-events/ics-advisories/icsa-24-016-02
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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/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
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-24-016-02&title=Integration%20Objects%20OPC%20UA%20Server%20Toolkit%20%28Update%20A%29
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-24-016-02
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-24-016-02
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Integration%20Objects%20OPC%20UA%20Server%20Toolkit%20%28Update%20A%29&body=www.cisa.gov/news-events/ics-advisories/icsa-24-016-02
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.5 Medium
AI Score
Confidence
High
0.0005 Low
EPSS
Percentile
17.0%