CVE-2022-39346 Missing length validation of user displayname in nextcloud server
A malicious user can overload the database by submitting excessively long display names, causing a denial of service 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
- Available
What is CVE-2022-39346?
CVE-2022-39346 is a low-severity denial of service vulnerability in Fedoraproject Fedora, published on 25 Nov 2022. 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 is an open source personal cloud server. Affected versions of nextcloud server did not properly limit user display names which could allow a malicious users to overload the backing database and cause a denial of service. It is recommended that the Nextcloud Server is upgraded to 22.2.10, 23.0.7 or 24.0.3. There are no known workarounds for this issue.
Which versions are affected by CVE-2022-39346?
It affects 3 products.
Products include Fedoraproject Fedora, Nextcloud Nextcloud Enterprise Server, Nextcloud Nextcloud Server.
How do I fix CVE-2022-39346?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-39346 being exploited?
There is no known exploitation of CVE-2022-39346 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as GHSA-6w9f-jgjx-4vj6.