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Renaming an item to a protected hidden folder deletes the target (NC-SA-2020-017)

15th July 2019

Risk level: Low

CVSS v3 Base Score: 6.8 (AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H)

CWE: Improper Access Control - Generic (CWE-284)

HackerOne report: 642515

Description

Improper access control in Groupfolders app 4.0.3 allowed to delete hidden directories when when renaming an accessible item to the same name.

Affected Software

  • Nextcloud Groupfolders < 4.0.4 (CVE-2020-8153)

Action Taken

The error has been fixed.

Resolution

It is recommended that the Groupfolders app is upgraded to 4.0.4.

Acknowledgements

The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:

  • Francesco MORO(sinotto) - Vulnerability discovery and disclosure.

This advisory is licensed CC BY-SA 4.0.

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