CVE-2023-25816 nextcloud vulnerable to Uncontrolled Resource Consumption
An attacker can cause resource exhaustion and denial of service by setting an excessively long password, requiring administrators to patch the Nextcloud instance.
- 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-2023-25816?
CVE-2023-25816 is a medium-severity denial of service vulnerability in Nextcloud Nextcloud Server, published on 24 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud is an Open Source private cloud software. Versions 25.0.0 and above, prior to 25.0.3, are subject to Uncontrolled Resource Consumption. A user can configure a very long password, consuming more resources on password validation than desired. This issue is patched in 25.0.3 No workaround is available.
Weakness: CWE-400
Which versions are affected by CVE-2023-25816?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2023-25816?
No fix has been published for CVE-2023-25816 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-2023-25816 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-25816 exists.
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-53q2-cm29-7j83.