Security Advisory

Limitation of app specific password scope can be bypassed (NC-SA-2017-009)

8th May 2017

Risk level: Low

CVSS v3 Base Score: 3 (AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N)

CWE: Improper Authorization (CWE-285)

HackerOne report: 191979

Description

Improper session handling allowed an application specific password without permission to the files access to the users file.

Affected Software

• Nextcloud Server < 11.0.3 (CVE-2017-0892)

Action Taken

The permission check has been corrected and reviewed.

Resolution

It is recommended that all instances are upgraded to Nextcloud 11.0.3.

Acknowledgements

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

• Mmakosdel - Vulnerability discovery and disclosure.

This advisory is licensed CC BY-SA 4.0.