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User can copy folder that contain files that are blocked by the files access control

Moderate
nickvergessen published GHSA-g8pr-g25r-58xj Nov 15, 2024

Package

Server (Nextcloud)

Affected versions

>= 27.0.0, >= 28.0.0

Patched versions

27.1.9, 28.0.5, 29.0.0
Server (Nextcloud Enterprise)
>= 21.0.0, >= 22.0.0, >= 23.0.0, >= 24.0.0, >= 25.0.0, >= 26.0.0, >= 27.0.0, >= 28.0.0
21.0.9.18, 22.2.10.23, 23.0.12.18, 24.0.12.14, 25.0.13.9, 26.0.13.3, 27.1.9, 28.0.5, 29.0.0

Description

Impact

After a user received a share with some files inside being blocked by the files access control, the user would still be able to copy the intermediate folder inside Nextcloud allowing them to afterwards potentially access the blocked files depending on the user access control rules.

Patches

It is recommended that the Nextcloud Server is upgraded to 27.1.9, 28.0.5 or 29.0.0
It is recommended that the Nextcloud Enterprise Server is upgraded to 21.0.9.18, 22.2.10.23, 23.0.12.18, 24.0.12.14, 25.0.13.9, 26.0.13.3, 27.1.9, 28.0.5 or 29.0.0

Workarounds

  • No workaround available

References

For more information

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Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

CVE ID

CVE-2024-52514

Weaknesses