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Duplicate setup of second factor allowed (NC-SA-2020-006)

25th October 2019

Risk level: Low

CVSS v3 Base Score: 4.6 (AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N)

CWE: Improper Authentication (CWE-287)

HackerOne report: 722748

Description

A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when trying to login.

Affected Software

  • Nextcloud Server < 17.0.1 (CVE-2019-15617)

Action Taken

The error has been fixed.

Resolution

It is recommended that the Nextcloud Server is upgraded to 17.0.1.

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.

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