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Missing brute force protection on cloud federation sharing

Low
nickvergessen published GHSA-2vwh-5v93-3vcq Aug 4, 2022

Package

Server (Nextcloud)

Affected versions

< 22.2.9, < 23.0.6, < 24.0.2

Patched versions

22.2.9, 23.0.6, 24.0.2

Description

Impact

An attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (a-zA-Z0-9 ^ 15).

Patches

It is recommended that the Nextcloud Server is upgraded to 22.2.9, 23.0.6 or 24.0.2.

Workarounds

As a workaround federated sharing can be disabled in the Admin Sharing settings: index.php/settings/admin/sharing

References

For more information

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Severity

Low
3.7
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVE ID

CVE-2022-31118

Weaknesses