CVE-2017-0936 Missing authorization in Nextcloud Server
Logged-in users can modify app password scopes of other users due to missing ownership checks in Nextcloud Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2017-0936?
CVE-2017-0936 is a medium-severity missing authorization vulnerability in Nextcloud Nextcloud Server, published on 28 Mar 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Nextcloud Server before 11.0.7 and 12.0.5 suffers from an Authorization Bypass Through User-Controlled Key vulnerability. A missing ownership check allowed logged-in users to change the scope of app passwords of other users. Note that the app passwords themselves where neither disclosed nor could the error be misused to identify as another user.
Weakness: CWE-639
Which versions are affected by CVE-2017-0936?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2017-0936?
No fix has been published for CVE-2017-0936 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-2017-0936 being exploited?
There is no known exploitation of CVE-2017-0936 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-84fw-wvq7-7x27.