CVE-2017-0883 Privilege escalation in Nextcloud Server
An authenticated attacker can escalate permissions to edit files they only have read access to via the OCS sharing API.
- 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-2017-0883?
CVE-2017-0883 is a medium-severity 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 permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.
Which versions are affected by CVE-2017-0883?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2017-0883?
No fix has been published for CVE-2017-0883 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-0883 being exploited?
There is no known exploitation of CVE-2017-0883 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-g265-v379-5vwj.