23 January 2017
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.0182 Schneider Electric homeLYnk Controller 23 January 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Schneider Electric homeLYnk Controller Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Cross-site Scripting -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2017-5157 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-019-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-019-01) Schneider Electric homeLYnk Controller Original release date: January 19, 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 6.3 ATTENTION: Remotely exploitable/low skill level to exploit Vendor: Schneider Electric Equipment: homeLYnk Controller, LSS100100 Vulnerability: Cross-site Scripting AFFECTED PRODUCTS Schneider Electric reports that the vulnerability affects the following products: homeLYnk Controller, LSS100100, all versions prior to V1.5.0 IMPACT An attacker may be able to exploit this vulnerability to cause execution of java script code. MITIGATION Schneider Electric has made a firmware that fixes this vulnerability available for download at: http://www.schneider-electric.com/en/download/document/FW1_5_1-hL/ (link is external) For more information on this vulnerability and more detailed mitigation instructions, please see Schneider Electric security notification SEVD-2017-011-01 at the following location: http://www.schneider-electric.com/ww/en/download/document/SEVD-2017-011-01 (link is external) NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. 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. VULNERABILITY OVERVIEW CROSS-SITE SCRIPTING CWE-79 The homeLYnk controller is susceptible to a cross-site scripting attack. User inputs can be manipulated to cause execution of java script code. CVE-2017-5157 has been assigned to this vulnerability. A CVSS v3 base score of 6.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L). RESEARCHER Mohammed Shameem reported this issue to Schneider Electric. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: email@example.com 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 firstname.lastname@example.org 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: email@example.com 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 iQIVAwUBWIVpu4x+lLeg9Ub1AQgFMw/+PFiYpXOHk6i3HCD3v60eTBneH+luopaN maiDkFIwTPosouuKrfMkwwgAeYFkMXy1ZYkjCbRq8btXd6L85E6RUHLnOMjvimOq Qr76ASuoERzFv37mPAkOKWwkm7iy3BkBdOVwD1BqJXKFDq96BegiuPwQH29jeGeW j2qzNX64xEckNHDjeZO9tna2gFgvF/n578tmyW5SkvldYDA3l4KqRHOwH6PDB2Lf PSe2YPUQihTJQF9HaqkXjoYiH8yoQzb98JnL6II61UL6X/i3pHIWTgTVTV4rO1Xl /abjgVCqIMrjnyqZTlY7XSBQnlV4JFRIqh0+POrvsHXmG3ePL/TfVmvi9reCDtrb luP1HZTJ9MgdIuj67mLzu2UvstrerMekgK0OAcJf6wHM3g+39qKNhf6xjjrbvB0D yxaEcRAbN3s/gRSkcAxlYnfIe8FZ0/wkeau7S8igH+WawZl4+OmEbkuzTkHxjHwC 6MqgWfe6e8XGfDcKbLFsY6UTZlLKugZBporu2aTQgnZlc0rgeeHievz2RB1EKy+V EY//FeNevWHnki2wcpgtrLCG0tjuyRr7Mh8PBaZ66kYB5QsI3mgk/oCqPUfMlX9s 4buY36quXJmAOsgKZLVcKPZkj1VjTxE3matFw7J+M8/z03kbMHA/SsX9TpB24ZAd 45WXsYMw0ak= =Cn3d -----END PGP SIGNATURE-----