CVE-2017-0884 Missing authorization in Nextcloud Server
An authenticated attacker can create empty folders in read-only shared directories due to a file caching logic error, violating permission restrictions.
- 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-2017-0884?
CVE-2017-0884 is a medium-severity missing authorization vulnerability in Nextcloud Nextcloud Server, published on 5 Apr 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2017-0884?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2017-0884?
No fix has been published for CVE-2017-0884 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-2017-0884 being exploited?
There is no known exploitation of CVE-2017-0884 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-w44g-m97f-qr3p.