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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2093 Schneider Electric IMT25 DTM Vulnerability 13 August 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Schneider Electric IMT25 DTM Publisher: ICS-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-3977 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-15-223-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-15-223-01) Schneider Electric IMT25 DTM Vulnerability Original release date: August 11, 2015 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/. OVERVIEW Alexander Bolshev, Gleb Cherbov, and Svetlana Cherkasova of Digital Security have identified a memory corruption vulnerability in Schneider Electric IMT25 DTM component. Schneider Electric has produced a patch that mitigates this vulnerability. Digital Security has tested this patch to validate that it resolves the vulnerability. This vulnerability could be exploited remotely. AFFECTED PRODUCTS The following Schneider Electric IMT25 Magnetic Flow DTM versions are affected: IMT25 Magnetic Flow DTM, Version 1.500.000 and all previous versions. IMPACT The vulnerability produces an overwritten memory value that could cause a denial of service and potentially remote code execution. The denial of service would impact the DTM component and possibly the Frame Application running the DTM software. Remote code execution means that a malicious actor could execute commands and software at the same level of permissions as the Frame Application on the machine hosting the Frame Application. Impact to individual organizations depends on many factors that are unique to each organization. NCICIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation. BACKGROUND Schneider Electric's corporate headquarters is located in Paris, France. It maintains offices in more than 100 countries worldwide. The affected product, IMT25 Magnetic Flow DTM, is an FDT/DTM software library. According to Schneider Electric, this is deployed across several sectors including Commercial Facilities, Critical Manufacturing, Energy, Water and Wastewater Systems, and others. Schneider Electric estimates that these products are used primarily in the United States and Europe with a small percentage in Asia. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW MEMORY CORRUPTION[a] A specific memory value can be overwritten by sending a special reply to a HART command. The overwritten memory value can cause a denial of service and remote code execution. CVE-2015-3977[b] has been assigned to this vulnerability. A CVSS v2 base score of 7.7 has been assigned; the CVSS vector string is (AV:A/AC:L/Au:S/C:C/I:C/A:C).[c] VULNERABILITY DETAILS EXPLOITABILITY This vulnerability could be exploited remotely from an adjacent network. EXISTENCE OF EXPLOIT No known public exploits specifically target this vulnerability. DIFFICULTY Crafting a working exploit for this vulnerability would be moderately difficult. Access to an adjacent network is required to exploit. This decreases the likelihood of a successful exploit. MITIGATION Schneider Electric has produced a new version to mitigate this vulnerability, and recommends customers download and install version 1.500.004 of the DTM software. This software version can be found at: http://iom.invensys.com/EN/Pages/Foxboro_MandI_DocTools_DeviceManagers.aspx/ Schneider Electric has published Security Notification SEVD-2015-215-01 with details about this vulnerability. This notice may be downloaded at http://www.schneider-electric.com/ww/en/download/document/SEVD-2015-215-01?showAsIframe=true For further information on vulnerabilities in Schneider Electric's products, please visit Schneider Electric's cybersecurity web page at http://www2.schneider-electric.com/sites/corporate/en/support/cybersecurity/cybersecurity.page 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. Keep control system traffic seperate from other networks as much as possible. 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 at: http://ics-cert.us-cert.gov/content/recommended-practices. 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 ICS-CERT 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 (http://ics-cert.us-cert.gov/). 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. a. CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, http://cwe.mitre.org/data/definitions/119.html, web site last accessed August 06, 2015. b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3977, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. c. CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:A/AC:L/Au:S/C:C/I:C/A:C, web site last accessed August 06, 2015 Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov 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 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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBVcv3IH6ZAP0PgtI9AQIM2A/+LgbggXxQBhukPcg+NHhL7ss63GoyUz10 K+ISHy65bE4cnlloUX5TrySZQ01SJvwJUdmoit3MdqXTWc/ZC6m9i3TBhBBDEFDf 3Oq5AA9iF7cVardPfw4uNitEOzmC068doRCyUpEhjyAyOJSy4SlSV1cN7vv2fk1u jxOSWXBY2QO4AJ2RE8QRXj5fvKmLUu7gHMHgIL4NWNKl6e8lrNuaBbmig2W+NJpW o3zVPr47AzwUUu7skYZ5IRkhV9IQ1kvny+WnPcLEB/0KCkIHtH9HMuzsvTRZJBGC Qaz4OMdMVhNkBfVJnIrxVBCP0oLgVUz6t08shnYbZmHNowasqpZ3b1GN7hycBFz7 KV5HK+XmuYmOt6tLfucT2bYVca5Iq0cZfHCHMwo2ac001buIpNoLoyS0hKQTOsgs evl+dYu1SiClR3fDkPB+HcyfDOFo/qbmSXPJJBcAYtUSYnbCkQgDwhoZHvb21THJ 2SERGdOBq8P/cv17DwbxAbPGDmtiHYaG7GDmJOqwcm3NhKbE1x+337xX+U+H35CW tdV/qVg0E4sasIUQdEdTlP3NmJVa42Frk99cV5O7ZyUE80itHkZCoOrNcvzuYftO PFk5ZZJtmz0nDLkKATnRp5/dkDWkitoArdznso6W1nxMFC7K4GKkH7JZc8hQL9kG 0vOre2ByN2I= =+ka2 -----END PGP SIGNATURE-----