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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3776 Advisory (icsa-19-281-01) SMA Solar Technology AG Sunny WebBox 9 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: SMA Solar Technology AG Sunny WebBox Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Cross-site Request Forgery -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-13529 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-281-01 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-281-01) SMA Solar Technology AG Sunny WebBox Original release date: October 08, 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 9.6 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: SMA Solar Technology AG o Equipment: Sunny WebBox o Vulnerability: Cross-Site Request Forgery 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to generate a denial-of-service condition, modify passwords, enable services, achieve man-in-the-middle, and modify input parameters associated with devices such as sensors. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following version of Sunny WebBox is affected: o Firmware Version 1.6 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 CROSS-SITE REQUEST FORGERY (CSRF) CWE-352 An attacker could send a malicious link to an authenticated operator, which may allow remote attackers to perform actions with the permissions of the user. This device uses IP addresses to maintain communication after a successful login, which would increase the ease of exploitation. CVE-2019-13529 has been assigned to this vulnerability. A CVSS v3 base score of 9.6 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:C/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Borja Merino and Eduardo Villaverde of the Technical Inspection Laboratory of the Mining School (University of Leon), through Adenda 2, coordinated this vulnerability with Carlos del Canto and Victor Fidalgo of INCIBE-CERT's Industrial Cybersecurity Team. 4. MITIGATIONS This product is end-of-life and is no longer supported. SMA recommends deactivation of port forwarding as it is not required for monitoring PV systems via the SMA Sunny Portal. If direct access to a system from the Internet is necessary, SMA recommends using an encrypted virtual private network (VPN). On delivery, any saved default passwords should also be replaced with individual secure passwords, and unused ports on the system/ router should be closed. SMA installers and administrators can answer specific questions about individual configuration of SMA devices. Basic information on this topic can also be found at: https://files.sma.de/dl/7680/CyberSecurity-TI-en-10.pdf 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 iQIVAwUBXZ1iymaOgq3Tt24GAQg+6BAAxCft3fu5kG4+bbv5V6MEMz+GcAG4KhjU uZ779RYqge4MvhjgMZgWuW2dml33y704mOmbMERM9C6r481sm442x5eNG6i1inN4 nY7x93TzR/3LJXpZUwcwqzevi+RwxoKlTouYYkM9trnVNZeKwY/xViQ/qVRpJaQa PPMVYkg0OG/wSdBug/O2TOAr9A8CmXgpkuMQcY/eP4wW1f1tI0CKCTMfdMIZuidb ftouIccTS16kNI8uaiUrcu3b8aj6Q2qfcvw/SkJV7JdqCAfZZ+olsYgFrxY6O3RL swPtJv/rqCLFrlhYloAXVOr7X09it+xDTCgP/4yRahk1RpZfZ1WDfJccrEKoc/xx pSm1+8FgunAOAp6AwHmeyDZD+m9wp8OOJKD+5mZyWrC/qlwSgNGXeupx5T3E8VHn zKa3nCqeEwlMhkSD2nWA/Vf6XsdKyO2EX9LHgQZII6We0M8nPPpxKxqWH2wrtZM4 KC2uqQExCfhczzbxp0yMN2fN5rFzvpgAe9bh0tA4VO+SHtbiK0a5F/ugwFxFBwmq rH2YD7lYr1h5SGgKOP6180okuXCQOvILX3QkTv832Z1wbksEFYHWGUgMCi2zbEZY l4ntfH05681qe/fAyryUXnZ6oLzVz0JgQh/7739t8g7DbM6+dC8mA53A8vZPXvGb GJnmkBlZCGE= =ppXZ -----END PGP SIGNATURE-----