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CVE-2019-9860

Status Candidate

Overview

Due to unencrypted signal communication and predictability of rolling codes, an attacker can "desynchronize" an ABUS Secvest wireless remote control (FUBE50014 or FUBE50015) relative to its controlled Secvest wireless alarm system FUAA50000 3.01.01, so that sent commands by the remote control are not accepted anymore.

Related Files

ABUS Secvest Remote Control Denial Of Service
Posted Mar 25, 2019
Authored by Matthias Deeg, Thomas Detert

Thomas Detert found out that the claimed "Encrypted signal transmission" of the Secvest wireless remote control FUBE50014 is not present and that the implemented rolling codes are predictable. By exploiting these two security issues, an attacker can simply desynchronize a wireless remote control by observing the current rolling code state, generating many valid rolling codes, and use them before the original wireless remote control. The Secvest wireless alarm system will ignore sent commands by the wireless remote control until the generated rolling code happens to match the window of valid rolling code values again. Depending on the number of used rolling codes by the attacker, a resynchronization without actually reconfiguring the wireless remote control could take quite a lot of time and effectless button presses. SySS found out that the new ABUS Secvest remote control FUBE50015 is also affected by this security vulnerability.

tags | advisory, remote
advisories | CVE-2019-9860
MD5 | 1af146c7db6df9a5a723c3e54422b6a1
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