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)
CWE: Improper Authentication - Generic (CWE-287)
HackerOne report: 924393
Description
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.
Affected Software
- Nextcloud Server < 19.0.2 (CVE-2020-8236)
Action Taken
The error has been fixed.
Resolution
It is recommended that the Nextcloud Server is upgraded to 19.0.2.
Acknowledgements
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.