-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Advisory ID: SYSS-2018-035 Product: ABUS Secvest Remote Control (FUBE50014, FUBE50015) Manufacturer: ABUS Affected Version(s): n/a Tested Version(s): n/a Vulnerability Type: Missing Encryption of Sensitive Data (CWE-311) Risk Level: High Solution Status: Open Manufacturer Notification: 2018-11-21 Solution Date: - Public Disclosure: 2019-03-25 CVE Reference: CVE-2019-9862 Authors of Advisory: Matthias Deeg (SySS GmbH), Thomas Detert ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Overview: ABUS Secvest FUBE50014 and FUBE50015 are wireless remote controls for the ABUS Secvest wireless alarm system. Some of the device features as described by the manufacturer are (see [1]): " * User-friendly remote control with easily identifiable symbols * Features ‘arm’, ‘disarm’ and ‘status query’ keys * 8 LEDs provide an overview and display current system status * Button for custom configuration available (Secvest wireless alarm system only) * Optional manual panic alarm available (Secvest wireless alarm system only) * Encrypted signal transmission * Rolling Code Thanks to the rolling code process this product is protected against so-called replay attacks. All controlling signals between this product and the Secvest alarm panel are in individualised and thus, are not able to be reproduced by third parties. This process is protected from third party tampering, and exceeds the requirements of the DIN EN 50131-1 level 2 security standard. " Due to the missing "Encrypted signal transmission", an attacker is able to eavesdrop sensitive data as cleartext, for instance the current rolling code state. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: Thomas Detert found out that the claimed "Encrypted signal transmission" of the Secvest wireless remote control FUBE50014 is not present at all. Thus, an attacker observing radio signals of an ABUS FUBE50014 wireless remote control is able to see all sensitive data of transmitted packets as cleartext and can analyze the used packet format and the communication protocol. For instance, this security issue could successfully be exploited to observe the current rolling code state of the wireless remote control and deduce the cryptographically weak used rolling code algorithm (see SySS security advisory SYSS-2018-034 [2]). SySS found out that the new ABUS Secvest remote control FUBE50015 is also affected by this security vulnerability. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): Thomas Detert developed a Teensy-based PoC tool using a CC1101 sub-1GHz transceiver that allows disarming the alarm system in an unauthorized way. He provided his tool including documentation and source to SySS GmbH for responsible disclosure purposes. SySS GmbH could successfully perform a disarming attack against an ABUS Secvest wireless alarm system by exploiting the unencrypted signal transmission of the ABUS Secvest wireless remote controls FUBE50014 and FUBE50015 and the predictable rolling code implementation using either Mr. Detert's PoC tool, a developed Python tool for the RFCat-based radio dongle YARD Stick One (see [3]), or a eZ430-Chronos (see [4]) with a specially developed firmware. Successful disarming attacks against an ABUS Secvest wireless alarm system are shown in our SySS proof-of-concept video "ABUS Secvest Rolling Code PoC Attack" [7]. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: SySS GmbH is not aware of a solution for this reported security vulnerability. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclosure Timeline: 2018-11-21: Vulnerability reported to manufacturer 2018-11-28: Vulnerability reported to manufacturer once more 2018-12-12: E-mail to ABUS support asking if they are going to give some feedback regarding the reported security issue 2018-12-12: Phone call with ABUS support, the reported security advisories were forwarded to the ABUS Security Center Support 2018-12-12: E-mail to ABUS Security Center Support asking if they are going to give some feedback regarding the reported security issue 2019-01-14: Updated information regarding remote control ABUS Secvest FUBE50015 2019-03-25: Public release of security advisory ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ References: [1] Product website for ABUS Secvest wireless remote control https://www.abus.com/eng/Home-Security/Alarm-systems/Secvest-wireless-alarm-system/Control-devices-and-extensions/Secvest-Wireless-Remote-Control2 [2] SySS Security Advisory SYSS-2018-034 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-034.txt [3] Product website YARD Stick One https://greatscottgadgets.com/yardstickone/ [4] Product website for Texas Instruments eZ430-Chronos http://www.ti.com/tool/EZ430-CHRONOS [5] SySS Security Advisory SYSS-2018-035 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-035.txt [6] SySS GmbH, SySS Responsible Disclosure Policy https://www.syss.de/en/news/responsible-disclosure-policy/ [7] SySS Proof-of-Concept Video: ABUS Secvest Rolling Code PoC Attack https://youtu.be/pSdsMVn-7gM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: This security vulnerability was found by Thomas Detert. Mr. Detert reported his finding to SySS GmbH where it was verified and later reported to the manufacturer by Matthias Deeg. E-Mail: matthias.deeg (at) syss.de Public Key: https://www.syss.de/fileadmin/dokumente/Materialien/PGPKeys/Matthias_Deeg.asc Key fingerprint = D1F0 A035 F06C E675 CDB9 0514 D9A4 BF6A 34AD 4DAB ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclaimer: The information provided in this security advisory is provided "as is" and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible. The latest version of this security advisory is available on the SySS Web site. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Copyright: Creative Commons - Attribution (by) - Version 3.0 URL: http://creativecommons.org/licenses/by/3.0/deed.en -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE0fCgNfBs5nXNuQUU2aS/ajStTasFAlyUoLoACgkQ2aS/ajSt TauU4Q/8CZRBKZPUkuVKjWkxurI4k9zH2+FRpVGlddz7Icx547VJdYUFLmGGXtQW yH5DrxrDJTM6IjPh8l6Dw3Vrf5EwP/AN5NAKKEeWGam+SVtF4jq2xZu7O+XgL5Q7 MO2BrqMFv5v/8R8bYkWTczMcwnznMZB/9xQnFaGr4Tp//LH8VQ54UfQH/7fCgVGT RcHMKKx05EuRD4coU1uogwdsjfXDmY+hTEl9vArV6S6dtqKa1vXv54PN07mvlZNW CvojEpWXmkzlev4mDmS+WsjvDRKDE5AW9Dflg1pcQLH0/20eK4PAjJAlk+2qaxM0 g1t3U6O/pjotp4BxHhrYvcPjAY0iLz4S1yCVte8VdQ1zZ1LQ0+N8zMBx3sp+Sfo0 mCJuj/GBpgtS/AsBcsNiSlHgUhl6tIkhbrocJ5F8f5yx0NLWeSZ+iZPp2IxHqT/b ZZj5xZd+WQjRnwN/Rp5Pe3Fgg/PBiCOpW4BmTiZytkm9fu23u3BDYC3daXzGgQmg WiodnGM/TsLWryuckh5blqP/595PNbvc/zdjofWHkz9fGX29hsvkoXo3AjFBYsFw mbtGKHPO9qod7Gp6xwLUVq4PXMP8Yhrif4/ZzHh2gzNFQ5gFH+6lUYpomwIqyw51 3knWk51fjOd1suaXGzxN87zbhqKhVh+GsopwsrG5OvbSQXhnYIA= =5FYg -----END PGP SIGNATURE-----