9 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
30.9%
Successful exploitation of these vulnerabilities could allow an attacker to execute code in the context of the session.
The following Advantech serial device servers are affected:
3.2.1 Cross-Site Scripting CWE-79
Advantech EKI-1524, EKI-1522, EKI-1521 devices through version 1.21 are affected by a stored cross-site scripting vulnerability, which can be triggered by authenticated users in the device name field of the web-interface.
CVE-2023-4202 has been assigned to this vulnerability. A CVSS v3 base score of 5.4 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).
3.2.2 Cross-Site Scripting CWE-79
Advantech EKI-1524, EKI-1522, EKI-1521 devices through version 1.24 are affected by a stored cross-site scripting vulnerability, which can be triggered by authenticated users in the ping tool of the web-interface.
CVE-2023-4203 has been assigned to this vulnerability. A CVSS v3 base score of 5.4 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).
These vulnerabilities were discovered during research by R. Haas, A. Resanovic, T. Etzenberger, M. Bineder at St. Plten UAS, supported and coordinated by CyberDanube.
Advantech recommends users upgrade to the latest version available (currently v1.26) as shown below:
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, 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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-4202
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-4203
cwe.mitre.org/data/definitions/79.html
cwe.mitre.org/data/definitions/79.html
github.com/cisagov/CSAF
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Advantech%20EKI-1524-CE%20series+https://www.cisa.gov/news-events/ics-advisories/icsa-23-269-04
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.advantech.com/en/support/details/firmware?id=1-1J9BEBL
www.advantech.com/en/support/details/firmware?id=1-1J9BECT
www.advantech.com/en/support/details/firmware?id=1-1J9BED3
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.cisa.gov/uscert/ncas/tips/ST04-014
www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf
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:L/UI:R/S:C/C:L/I:L/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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