PIN for passwordless WebAuthn is asked for but not verified (NC-SA-2020-037)
25th August 2020
Risk level: Low
CVSS v3 Base Score: 4.3 (AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
HackerOne report: 924393
A wrong configuration in Nextcloud Server 19.0.1 incorrectly made the user feel the passwordless WebAuthn is also a two factor verification by asking for the PIN of the passwordless WebAuthn but not verifying it.
- Nextcloud Server < 19.0.2 (CVE-2020-8236)
The error has been fixed.
It is recommended that the Nextcloud Server is upgraded to 19.0.2.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:
This advisory is licensed CC BY-SA 4.0.