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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2587 Advisory (icsa-19-192-03) Siemens TIA Administrator (TIA Portal) 12 July 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens TIA Administrator Publisher: ICS-CERT Operating System: Windows Impact/Access: Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-10915 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-192-03 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-192-03) Siemens TIA Administrator (TIA Portal) Original release date: July 11, 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 8.0 o ATTENTION : Low skill level to exploit o Vendor : Siemens o Equipment : TIA Administrator (TIA Portal) o Vulnerability : Improper Access Control 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an execution of some commands without proper authentication. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of TIA Administrator are affected: o TIA Administrator: All versions prior to v1.0 SP1 Upd1 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER ACCESS CONTROL CWE-284 The integrated configuration web application (TIA Administrator) may allow an attacker to execute certain application commands without proper authentication. CVE-2019-10915 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been calculated; the CVSS vector string is ( AV:L/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, Food and Agriculture, Water and Wastewater Systems o COUNTRIES/AREAS DEPLOYED : Worldwide o COMPANY HEADQUARTERS LOCATION : Germany 3.4 RESEARCHER Joseph Bingham of Tenable reported this vulnerability to Siemens. 4. MITIGATIONS Siemens recommends users update to v1.0 SP1 Upd1 or later . Siemens also recommends users restrict access to Port 8888/TCP to localhost (default). For more information on this vulnerability and associated software updates, please see Siemens' security advisory SSA-721298 at: https://www.siemens.com/ cert/advisories. NCCIC 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. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC 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 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 NCCIC for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. - --------------------------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 iQIVAwUBXSgap2aOgq3Tt24GAQjaUQ//ZZ2miaCc9zv2/vZioR39rgrVTCjHyBUr Gmgr0AE6Z49nfqYht32cbMfbnmdrhTJtgui8HikUxKynDc69x+12qKngsb2FojxD XwFJg/l6wk5/OvMEQfjq+j1/ssFZXEdQtnIURAICw0jNVtdo19QK/HMovcc+3G68 apMHRApBJuSd1RwpNECC4H/QyDeGukNzthR9FEjsQvskKOXWhQLLhz//bQYXsWxT PL7kFSBU8Od3sHbKGY911lQ0IQmTnguY0FQy7qPCXohCA84udN7HPRh9bK+CrJpF 8fFbRHVyVhyEWK8WS0bnPbeKRzX28pEEMgaxtA5BVyOJ6TeOrybDV9US60aEgeBq uKTM7V4X41M7sBxDgCtdYSWsVZxjLchjtO6QRZlulmmz3NJOfO/yr+9o0Wym4jzo SbTf3re62NsatZ+JPXkEEOKBTORg7r9MzLBR41hmP4SLCcq1kFpUohxrnfnM7bpg uaAMU2IDvGdgXbbTZFtnsR2dIQgqxBf+AdkC4K8SesOtfsf4sBJQf+cl91BkGuJ1 TxBvYIQuq0oxUjK25BJ5KS7EHOCpVXYscaQ8pBSt4ZvV9oJlvDsF7vHfgWqtlNLu mTJ1YcTelkZt7SaxZiOcSF7EBuv0Y1XXjalTMebsdJEjZMZPNrA1K9rWtQhT9nIs 2vUFCm5clPM= =OE9p -----END PGP SIGNATURE-----