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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4314 Advisory (icsa-19-318-04) Omron CX-Supervisor 15 November 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Ormon CX-Supervisor Publisher: ICS-CERT Operating System: Windows Impact/Access: Administrator Compromise -- Remote with User Interaction Denial of Service -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-18251 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-318-04 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-318-04) Omron CX-Supervisor Original release date: November 14, 2019 Legal Notice All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 8.8 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: Omron o Equipment: CX-Supervisor o Vulnerability: Use of Obsolete Function 2. RISK EVALUATION Successful exploitation of this vulnerability could result in information disclosure, total compromise of the system, and system unavailability. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of both "Full Development" and "Runtime Only" packages of Omron's SCADA and HMI package CX-Supervisor are affected: o CX-Supervisor Versions 3.5 (12) and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 USE OF OBSOLETE FUNCTION CWE-477 Omron CX-Supervisor ships with Teamviewer Version 5.0.8703 QS. This version of Teamviewer is vulnerable to an obsolete function vulnerability requiring user interaction to exploit. CVE-2019-18251 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Japan 3.4 RESEARCHER Michael DePlante of Trend Micro's Zero Day Initiative reported this vulnerability to CISA. 4. MITIGATIONS Omron recommends users update to CX-Supervisor Version 3.51 (9). The following link contains Omron's explanation for the changes and instructions to obtain the update: https://www.myomron.com/index.phpaction=kb&article=1713 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. CISA also recommends users take the following measures to protect themselves from social engineering attacks: o Do not click web links or open unsolicited attachments in email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploits specifically target this vulnerability. - --------------------------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 iQIVAwUBXc4a22aOgq3Tt24GAQgoIA/+KQEhRCrJoMFSccuYoquQNEvqrWYsxfi7 Xz2+2X8Qveq9YAg01nBQrvfQMORLXQZEYc3Dx56ca10kpIddKq+OXmGoh/GGC1Q8 Ixzgd2YsHaJMAgZYesxpIkEJAh18IZ01VKBpu9TlxletPKATBBdld/eKIriaoI0t PeX+TrcTHx35Yj4qqHDdS1okduzhUb+aJbgMVtHnExGvZ5O4KhJ0Hy8guDLXHbEj semj6+YJN2eVPxNFucrmUfxOMjP5SuCoEZmheRyFlXkj9hdEjLqspP2z0o8EN9rI iOwIgsvFqPxUI/HPcxS6V+btKXQ94PC/ZYkQ9hgvmLWudRUmVjBGpK/0eg3vAcoN z3x7NCf1fKHkBOlCrbIU7zkKgh3xOrtpr4UsI2udA6qwmWnjd3xLG5ygfIPAAzQS LaDEWErDGphjFybjXKYHDL9MPAOzBED8pDqyH21qSsZmWmG/eYCo2rW9VxJgbTlv hguFnS7VZd0ouJAVPpWrgEpUQ66g8T8ISh6vgXEmD+hKSkQyX8ZnIIdHOpYe4fVx f6zT7w5KdME4N2jKSmhRhTmtl3w3CVx78FjzlwBOEe5st28UC8XA5sjnYhknFy1j LgHwaDpHD7PaGYIlRTVkrUoc+Z2rR4ZxROEuigyNlAc+A64ljc9g6syojpZPns7E j4qeZbsag3g= =W48/ -----END PGP SIGNATURE-----