CVE-2024-52521 Nextcloud Server has a potential hash collision for background jobs could skip queuing them
Weak MD5 hashing in Nextcloud Server background jobs can cause collisions, leading to skipped job execution and potential denial of service.
- 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-2024-52521?
CVE-2024-52521 is a low-severity vulnerability in Nextcloud Nextcloud Server, published on 15 Nov 2024. 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 a self hosted personal cloud system. MD5 hashes were used to check background jobs for their uniqueness. This increased the chances of a background job with arguments falsely being identified as already existing and not be queued for execution. By changing the Hash to SHA256 the probability was heavily decreased. It is recommended that the Nextcloud Server is upgraded to 28.0.10, 29.0.7 or 30.0.0.
Weakness: CWE-328
Which versions are affected by CVE-2024-52521?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2024-52521?
No fix has been published for CVE-2024-52521 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-52521 being exploited?
There is no known exploitation of CVE-2024-52521 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-2q6f-gjgj-7hp4.