CVE-2016-9461 Missing authorization in Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4
Authenticated attackers with read-only share access can upload new files due to missing permission checks on WebDAV COPY actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2016-9461?
CVE-2016-9461 is a medium-severity missing authorization vulnerability in Nextcloud Nextcloud Server, published on 28 Mar 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a read-only share to put new files in there. It was not possible to modify existing files.
Which versions are affected by CVE-2016-9461?
It affects 2 products.
Products include Nextcloud Nextcloud Server, Owncloud Owncloud.
How do I fix CVE-2016-9461?
No fix has been published for CVE-2016-9461 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2016-9461 being exploited?
There is no known exploitation of CVE-2016-9461 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-92wm-vqxv-vpf9.