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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0645 Advisory (icsa-20-051-01) B&R Industrial Automation Automation Studio and Automation Runtime 25 February 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: B&R Industrial Automation Automation Studio and Automation Runtime Publisher: ICS-CERT Operating System: Windows Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2019-19108 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-20-051-01 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-20-051-01) B&R Industrial Automation Automation Studio and Automation Runtime Original release date: February 20, 2020 Legal Notice All information products included in https://us-cert.gov/ics are provided"as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://www.us-cert.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.4 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: B&R Industrial Automation GmbH o Equipment: Automation Studio and Automation Runtime o Vulnerability: Improper Authorization 2. RISK EVALUATION Successful exploitation of this vulnerability may allow a remote attacker to modify the configuration of affected devices. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of B&R products are affected: o Automation Studio Versions 2.7, 3.0.71, 3.0.80, 3.0.81, 3.0.90, 4.0.x to 4.6.4, and 4.7.2 o Automation Runtime Versions 2.96, 3.00, 3.01, 3.06, 3.07, 3.08 to 3.10, 4.00 to 4.03, 4.04 to 4.03, 4.04 to 4.63, 4.72 and above. 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER AUTHORIZATIONCWE-285 The affected products are vulnerable to a weakness in SNMP service, which allows unauthenticated users to modify the configuration via the service. CVE-2019-19108 has been assigned to this vulnerability. A CVSS v3 base score of 9.4 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:L/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Austria 3.4 RESEARCHER Yehuda Anikster and Amir Preminger of Claroty reported this vulnerability to CISA. 4. MITIGATIONS B&R reports product-technical reasons disallow the changing of SNMP credentials. To reduce risk from this vulnerability, the following Automation Studio versions disable the SNMP service by default in newly created AS projects: o AS 4.6.5 (Planned release date: 2020-03-27) and higher o AS 4.7.3 (Planned release date: 2020-04-10) and higher o AS 4.8.2 (Planned release date: 2020-06-11) and higher B&R reports the above-mentioned dates denoted as planned are preliminary and may be subject to change. Registered users may approach their local B&R service organization in case of questions. B&R recommends that affected users evaluate their need for the SNMP service and disable it if possible. For more information related to this vulnerability please refer to the B&R advisory . For additional information and support, please contact B&R service . CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices. 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. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXlRdJ2aOgq3Tt24GAQixIhAAtRT170Nu79aiC8JvfNyxn7VfBSrdV5yy 1q+U8M+txkiZinisPvND7hobLkka3XoEQ42h6PKaV8sfQDigaczv0R3WS1qoxx3u N3wDPz7BrQWCullrD/jVZuSrSUPawo+vuKNPkThgfTQTT4/hCDzPQmJpFN4zw5GM FODfgvZjn7GXpmnJv+RB6jbgc17Se3EU0D0qJRE+aL2i97lBeY1q7kJPQ0Yr6E3B 1NwgwXh/xlRc5guKlPdonr218I33HIrCOOspCCNKfDqu+Er46wJqfc92xS2WmAEj zA+Gqp47QhkQUDqKuo45S/x8DJWXN4OEAvYTQeTgaiGuNKwMnEk7aMgV5bTgcNwl aMvqfJUwZ3jenf8LKyrQy0bMwnK2iNip5u3hiX2yWuko7XIDLrsh5jP/EYelxF91 0gpMT5DQNOd7S85GPke2dvl/Fa/38Gr74oyMJeaKGipQ796oKc/QVZ2RFIwyjz3V hRxSWVZD/QxpxV4GnNa372OtgeQCZWCDGCFBPKBsR55y80YYCbSrqUCJig8a9Y1h naRXnoiHNtm4pv4V6IN+YnO5C4QcX52Fegnu3pKVdaiDXgCizWa7Lqn6adCBKnD+ 9B+4Y3cDOm3Nw2wgypM8xDoKm7F6er6UTLg8qXUUj+IVA37icdS2MTB8gOtkW0kb /osBfMQbHww= =g0P5 -----END PGP SIGNATURE-----