CVE-2023-28643 Potential share collision for recipients when caching is enabled in nextcloud server
Attackers can overwrite shared folders with same-named shares when caching is enabled, causing data loss or confusion for recipients.
- 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-2023-28643?
CVE-2023-28643 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 30 Mar 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 server is an open source home cloud implementation. In affected versions when a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to `{name} (2)`. It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9. Users unable to upgrade should avoid sharing 2 folders with the same name to the same user.
Weakness: CWE-706
Which versions are affected by CVE-2023-28643?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2023-28643?
No fix has been published for CVE-2023-28643 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-28643 being exploited?
There is no known exploitation of CVE-2023-28643 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-hhq4-4pr8-wm27.