The Z-Wave specification requires that S2 security can be downgraded to S0 or other less secure protocols, allowing an attacker within radio range during pairing to downgrade and then exploit a different vulnerability (CVE-2013-20003) to intercept and spoof traffic.
A protocol or its implementation supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the strongest algorithm that is available to both parties.
| Link | Tags |
|---|---|
| https://www.pentestpartners.com/security-blog/z-shave-exploiting-z-wave-downgrade-attacks/ | third party advisory exploit |
| https://community.silabs.com/s/share/a5U1M000000knqNUAQ/updated-your-zwave-smart-locks-are-safe-and-secure | third party advisory |