GHSA-22w3-693w-x895: webauthn-rs-core/webauthn-authenticator-rs: Origin validation mismatch possible when subdomains are allowed

webauthn-rs-core ([Relying Party][rp]) and webauthn-authenticator-rs ([client][]) checked that [an Origin in CollectedClientData][origin] is valid for [an RP ID][rpid] with [str::ends_with()][ends-with], [without checking for a dot (.) before the RP ID when allowing subdomains][registerable-suffix].

This check is flawed, and could allow requests from an attacker-controlled domain such as hermit-crab.example to be accepted for the RP ID crab.example (assuming .example was publicly-registerable TLD) when the RP allows authenticating from a subdomain (disabled by default in webauthn-rs-core and webauthn-rs).