{ "document": { "acknowledgments": [ { "organization": "ABB PSIRT", "summary": "reported this vulnerability to CISA." } ], "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Disclosure is not limited", "tlp": { "label": "WHITE", "url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update is available that resolves a vulnerability identified by B&Rs internal security analysis in the product versions listed as affected in this advisory.\n\nAn attacker who successfully exploited this vulnerability could cause the product to stop.", "title": "Summary" }, { "category": "other", "text": "For any installation of software-related B&R products we strongly recommend the following (non-exhaustive) list of cyber security practices:\n-Isolate special purpose networks (e.g. for automation systems) and remote devices behind firewalls and separate them from any general-purpose network (e.g. office or home networks).\n-Install physical controls so no unauthorized personnel can access your devices, components, peripheral equipment, and networks.\n-Never connect programming software or computers containing programing software to any network other than the network for the devices that it is intended for.\n-Scan all data imported into your environment before use to detect potential malware infections.\n-Minimize network exposure for all applications and endpoints to ensure that they are not accessible from the Internet unless they are designed for such exposure and the intended use requires such.\n-Ensure all nodes are always up to date in terms of installed software, operating system, and firmware patches as well as anti-virus and firewall.\n-When remote access is required, use secure methods, such as Virtual Private Networks (VPNs). Recog-nize that VPNs may have vulnerabilities and should be updated to the most current version availa-ble. Also, understand that VPNs are only as secure as the connected devices.\n\nMore information on recommended practices can be found in the following documents:\nDefense in Depth for B&R products\n", "title": "General security recommendations" }, { "category": "other", "text": "For additional instructions and support please contact your local B&R service organization. For contact information, see https://www.br-automation.com/en/about-us/locations/.\n\nInformation about ABB\u2019s cyber security program and capabilities can be found at www.abb.com/cybersecurity.\n", "title": "Support" }, { "category": "legal_disclaimer", "text": "The information in this document is subject to change without notice, and should not be construed as a commitment by B&R.\n\nB&R provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document. In no event shall B&R or any of its suppliers be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, or from the use of any hardware or software described in this document, even if B&R or its suppliers have been advised of the possibility of such damages.\n\nThis document and parts hereof must not be reproduced or copied without written permission from B&R, and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose.\n\nAll rights to registrations and trademarks reside with their respective owners.\n", "title": "Notice" }, { "category": "general", "text": "Deactivate the vulnerable component\n\nThe SDM is deactivated by default on Automation Runtime version >=6.0. For Automation Runtime versions <6.0, the SDM can be deactivated in the Automation Studio project. Please refer to Automation Help GUID 1d915d67-07f7-4034-a472-c204b5cabbfe for further guidance.\n\nAccess to the System Diagnostic Manager (SDM) shall be restricted to trusted personnel through appropriate external security measures. If SDM is required solely for maintenance purposes, it should be enabled or access granted only for the minimum time necessary to perform the task.\n\nLimit accessibility\n\nB&R recommends in general to configure the HTTP protocol over TLS (HTTPS). \n\nCustomers may restrict access to the webserver by configuring mutual TLS (mTLS) in the Automation Studio project (Option \u201cValidate SSL communication partner\u201d). Be aware that configuring mTLS would impact also other applications using the AR webserver (e.g. mapp View). Please refer to Automation Help GUID 01ced6c0-28ef-4aaa-bd05-2442b971859c to learn more about the TLS Configuration in Automation Studio.\n\nIn addition, accessibility of the webserver can be limited to trusted IP addresses using the Automation Runtime host-based firewall. Please refer to Automation Help GUID 75b8994b-f97a-4e0f-8278-43c7a737e65f for details.\n\nRefer to section \u201cGeneral security recommendations\u201d for further advise on how to keep your system secure.\n\n", "title": "Mitigating factors" }, { "category": "other", "text": "B&R has a rigorous internal cyber security continuous improvement process which involves regular testing with industry leading tools and periodic assessments to identify potential product issues. Occasionally an issue is determined to be a design or coding flaw with implications that may impact product cyber security.\n\nWhen a potential product vulnerability is identified or reported, B&R immediately initiates our vulnerability handling process. This entails validating if the issue is in fact a product issue, identifying root causes, determining what related products may be impacted, developing a remediation, and notifying end users and governmental organizations.\n\nThe resulting Cyber Security Advisory intends to notify customers of the vulnerability and provide details on which products are impacted, how to mitigate the vulnerability or explain workarounds that minimize the potential risk as much as possible. The release of a Cyber Security Advisory should not be misconstrued as an affirmation or indication of an active threat or ongoing campaign targeting the products mentioned here. If B&R is aware of any specific threats, it will be clearly mentioned in the communication.\n\nThe publication of this Cyber Security Advisory is an example of B&R\u2019s commitment to the user community in support of this critical topic. Responsible disclosure is an important element in the chain of trust we work to maintain with our many customers. The release of an Advisory provides timely information which is essential to help ensure our customers are fully informed", "title": "Purpose" }, { "category": "faq", "text": "What causes the vulnerability?\n\nThe vulnerabilities are caused by improper resource locking.\n\nWhat is System Diagnostics Manager (SDM)?\n\nSystem Diagnostics Manager (SDM) is a webpage available over the Automation Runtime Webserver, showing key diagnostic information of the running controller\n\nWhat is Automation Runtime (AR)?\n\nB&R Automation Runtime is a middleware system enabling customers to run applications on B&R target systems.\n\nWhat might an attacker use the vulnerability to do?\n\nAn attacker who successfully exploited these vulnerabilities could cause the affected system node to stop.\n\nHow could an attacker exploit the vulnerability?\n\nAn attacker could try to exploit the vulnerability by creating a specially crafted message and sending the message to an affected system node. This would require that the attacker has access to the system network, by connecting to the network either directly or through a wrongly configured or penetrated firewall, or that he installs malicious software on a system node or otherwise infects the network with malicious software. Recommended practices help mitigate such attacks, see section Mitigating Factors above.\n\nCould the vulnerability be exploited remotely? \nYes, an attacker who has network access to an affected system node could exploit this vulnerability. Recommended practices include that process control systems are physically protected, have no direct connections to the Internet, and are separated from other networks by means of a firewall system that has a \nminimal number of ports exposed. \nWhen this security advisory was issued, had this vulnerability been publicly disclosed?\nNo, B&R discovered the vulnerabilities through its own security analysis.\nWhen this security advisory was issued, had B&R received any reports that this \nvulnerability was being exploited?\nNo, B&R had not received any information indicating that this vulnerability had been exploited when this \nsecurity advisory was originally issued.", "title": "Frequently asked questions" }, { "category": "legal_disclaimer", "text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).", "title": "Legal Notice and Terms of Use" }, { "category": "other", "text": "This ICSA is a verbatim republication of ABB PSIRT SA25P002 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided \"as-is\" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact ABB PSIRT directly for any questions regarding this advisory.", "title": "Advisory Conversion Disclaimer" }, { "category": "general", "text": "CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.", "title": "Recommended Practices" }, { "category": "general", "text": "Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.", "title": "Recommended Practices" }, { "category": "general", "text": "Locate control system networks and remote devices behind firewalls and isolate them from business networks.", "title": "Recommended Practices" }, { "category": "general", "text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. 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.", "title": "Recommended Practices" }, { "category": "general", "text": "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 in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.", "title": "Recommended Practices" }, { "category": "general", "text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.", "title": "Recommended Practices" }, { "category": "other", "text": "Chemical, Communications, Critical Manufacturing, Dams, Energy, Healthcare and Public Health, Information Technology, Water and Wastewater", "title": "Critical infrastructure sectors" }, { "category": "other", "text": "Worldwide", "title": "Countries/areas deployed" }, { "category": "other", "text": "Switzerland", "title": "Company headquarters location" } ], "publisher": { "category": "other", "contact_details": "central@cisa.dhs.gov", "name": "CISA", "namespace": "https://www.cisa.gov/" }, "references": [ { "category": "self", "summary": "B&R CYBERSECURITY ADVISORY - CSAF Version", "url": "https://psirt.abb.com/csaf/2025/sa25p002.json" }, { "category": "self", "summary": "B&R Advisory Link", "url": "https://www.br-automation.com/fileadmin/SA25P002-f6a69e61.pdf" }, { "category": "self", "summary": "ICS Advisory ICSA-26-146-04 JSON", "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-146-04.json" }, { "category": "self", "summary": "ICS Advisory ICSA-26-146-04 - Web Version", "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-146-04" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/topics/industrial-control-systems" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b" } ], "title": "ABB B&R Automation Runtime DoS Vulnerability in System Diagnostics Manager (SDM)", "tracking": { "current_release_date": "2026-05-26T06:00:00.000000Z", "generator": { "date": "2026-05-26T13:10:33.512980Z", "engine": { "name": "CISA CSAF Generator", "version": "1.5.0" } }, "id": "ICSA-26-146-04", "initial_release_date": "2025-10-07T00:30:00.000000Z", "revision_history": [ { "date": "2025-10-07T00:30:00.000000Z", "legacy_version": "Initial", "number": "1", "summary": "Initial version." }, { "date": "2026-05-26T06:00:00.000000Z", "legacy_version": "CISA Republication", "number": "2", "summary": "Initial CISA Republication of ABB PSIRT SA25P002 advisory" } ], "status": "final", "version": "2" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "<6.3", "product": { "name": "Automation Runtime <6.3", "product_id": "CSAFPID-0001" } }, { "category": "product_version", "name": "6.3", "product": { "name": "Automation Runtime 6.3", "product_id": "CSAFPID-0002" } }, { "category": "product_version_range", "name": "