Incorrect permission assignment for critical resource in nextcloud - CVE-2017-0884
Published: April 5, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU39272
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-0884
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Nextcloud
Affected software:
nextcloud
nextcloud
Detailed vulnerability description
The vulnerability allows a remote authenticated user to manipulate data.
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a creation of folders in read-only folders despite lacking permissions issue. Due to a logical error in the file caching layer an authenticated adversary is able to create empty folders inside a shared folder. Note that this only affects folders and files that the adversary has at least read-only permissions for.
How to mitigate CVE-2017-0884
Install update from vendor's website.