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Potential share collision for recipients when caching is enabled

Moderate
nickvergessen published GHSA-hhq4-4pr8-wm27 Mar 30, 2023

Package

Server (Nextcloud)

Affected versions

>= 24.0.0, >= 25.0.0

Patched versions

24.0.9, 25.0.3
Server (Nextcloud Enterprise)
>= 24.0.0, >= 25.0.0
24.0.9, 25.0.3

Description

Impact

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 … (2)

Patches

It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9.
It is recommended that the Nextcloud Enterprise Server is upgraded to 25.0.3 or 24.0.9.

Workarounds

Avoid sharing 2 folders with the same name to the same user.

References

For more information

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Severity

Moderate
5.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

CVE ID

CVE-2023-28643

Weaknesses