25 January 2017
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.0221 Schneider Electric Wonderware Historian 25 January 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Schneider Electric Wonderware Historian Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2017-5155 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-024-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-024-01) Schneider Electric Wonderware Historian Original release date: January 24, 2017 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/. CVSS V3 7.3 ATTENTION: Remotely exploitable/Low skill level to exploit Vendor: Schneider Electric Equipment: Wonderware Historian Vulnerability: Credentials Management AFFECTED PRODUCTS The following Wonderware Historian versions are affected: Wonderware Historian 2014 R2 SP1 P01 and earlier. IMPACT Successful exploitation of this vulnerability could allow a malicious entity to compromise Historian databases. In some installation scenarios, SQL resources beyond those created by Wonderware Historian may be compromised as well. MITIGATION Schneider Electric strongly recommends that the following steps be taken to mitigate this vulnerability: Identify where the logins are used. Some likely places for the logins to have been used are: Wonderware Historian Client, Wonderware InTouch and Application Object scripts, Wonderware Information Server configuration, and Custom applications not supplied by Schneider Electric that interact with Historian data. Logins that are not used should be disabled from the SQL Server Management Studio. For logins that are still in use, the passwords should be changed from the default. For an increased level of security, Schneider Electric and Microsoft further advise that connectivity to SQL Server be accomplished with Windows Integrated Security as opposed to using native SQL logins. NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls, and isolate them from the business network. 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. ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page. 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 ICSCERT Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability is not remotely exploitable. Low skill level is needed to exploit. VULNERABILITY OVERVIEW CREDENTIALS MANAGEMENT CWE-255 Wonderware Historian creates logins with default passwords, which can allow a malicious entity to compromise Historian databases. In some installation scenarios, resources beyond those created by Wonderware Historian may be compromised as well. CVE-2017-5155 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). RESEARCHER Ruslan Habalov and Jan Bee of the Google ISA Assessments Team discovered this vulnerability. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: firstname.lastname@example.org (link sends e-mail) Toll Free: 1-877-776-7585 International Callers: (208) 526-0900 For industrial control systems security information and incident reporting: http://ics-cert.us-cert.gov ICS-CERT 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 email@example.com 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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org 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). 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