CVE-2023-35173 End-to-End encrypted file-drops can be made inaccessible
An attacker can render previously dropped files inaccessible by providing invalid metadata, causing a denial of service for Nextcloud users.
- 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-2023-35173?
CVE-2023-35173 is a medium-severity denial of service vulnerability in nextcloud security-advisories, published on 23 Jun 2023. 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 End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side. By providing an invalid meta data file, an attacker can make previously dropped files inaccessible. It is recommended that the Nextcloud End-to-end encryption app is upgraded to version 1.12.4 that contains the fix.
Weakness: CWE-284
Which versions are affected by CVE-2023-35173?
It affects 1 product.
Products include Nextcloud End-to-End Encryption.
How do I fix CVE-2023-35173?
No fix has been published for CVE-2023-35173 yet. Limit exposure of the affected software until one is available.
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-2023-35173 being exploited?
There is no known exploitation of CVE-2023-35173 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
Sources
Also known as GHSA-x7c7-v5r3-mg37.