CVE-2023-25579 Directory traversal in Nextcloud server
Attackers can create paths outside their own space and overwrite other users' data via crafted paths in Nextcloud server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-25579?
CVE-2023-25579 is a medium-severity path traversal vulnerability in Nextcloud Nextcloud Server, published on 22 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to creation of paths outside of ones own space and overwriting data from other users with crafted paths. This issue has been addressed in versions 25.0.2, 24.0.8, and 23.0.12. Users are advised to upgrade. There are no known workarounds for this issue.
Weakness: CWE-22
Which versions are affected by CVE-2023-25579?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2023-25579?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2023-25579 being exploited?
There is no known exploitation of CVE-2023-25579 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-273v-9h7x-p68v.