CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
45.1%
Successful exploitation of this vulnerability could cause a denial-of-service condition.
The following CODESYS Control V3 runtime systems, all Versions 3.5.11.0 to 3.5.15.0, containing the CODESYS OPC UA Server supporting OPC UA Security, are affected:
Sending specific crafted requests from a trusted OPC UA client may cause a NULL pointer dereference, which may trigger a denial-of-service condition.
CVE-2019-13542 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
3S-Smart Software Solutions GmbH reported this vulnerability to CISA.
3S-Smart Software Solutions GmbH has released Version 3.5.15.0 to resolve this vulnerability for all affected CODESYS products.
Please visit the CODESYS update page for more information on how to obtain the software update: https://www.codesys.com/download/
As part of a security strategy, 3S-Smart Software Solutions GmbH recommends the following general defense measures to reduce the risk of exploits:
For more information, 3S-Smart Software Solutions GmbH has released a security report that can be viewed at the following link:
<https://www.codesys.com/fileadmin/data/customers/security/2019/Advisory2019-07_CDS-65080.pdf>
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 us-cert.gov. 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 webpage on us-cert.gov 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 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-2019-13542
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-255-04
customers.codesys.com/fileadmin/data/customers/security/CODESYS-Security-Whitepaper.pdf
cwe.mitre.org/data/definitions/476.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=3S-Smart%20Software%20Solutions%20GmbH%20CODESYS%20Control%20V3%20OPC%20UA%20Server+https://www.cisa.gov/news-events/ics-advisories/icsa-19-255-04
www.codesys.com/download/
www.codesys.com/fileadmin/data/customers/security/2019/Advisory2019-07_CDS-65080.pdf
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-19-255-04&title=3S-Smart%20Software%20Solutions%20GmbH%20CODESYS%20Control%20V3%20OPC%20UA%20Server
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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-19-255-04
www.oig.dhs.gov/
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=3S-Smart%20Software%20Solutions%20GmbH%20CODESYS%20Control%20V3%20OPC%20UA%20Server&body=www.cisa.gov/news-events/ics-advisories/icsa-19-255-04
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
45.1%