Nextcloud Server up to 22.2.6/23.0.3 Federated Share insufficient logging

Summaryinfo

A vulnerability described as problematic has been identified in Nextcloud Server up to 22.2.6/23.0.3. Affected is an unknown function of the component Federated Share Handler. The manipulation results in insufficient logging. This vulnerability is cataloged as CVE-2022-31120. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Nextcloud Server up to 22.2.6/23.0.3 (Cloud Software). Affected is an unknown code block of the component Federated Share Handler. The manipulation with an unknown input leads to a insufficient logging vulnerability. CWE is classifying the issue as CWE-778. When a security-critical event occurs, the product either does not record the event or omits important details about the event when logging it. This is going to have an impact on integrity, and availability. CVE summarizes:

Nextcloud server is an open source personal cloud solution. The audit log is used to get a full trail of the actions which has been incompletely populated. In affected versions federated share events were not properly logged which would allow brute force attacks to go unnoticed. This behavior exacerbates the impact of CVE-2022-31118. It is recommended that the Nextcloud Server is upgraded to 22.2.7, 23.0.4 or 24.0.0. There are no workarounds available.

The weakness was shared 08/05/2022 as GHSA-9qvg-7fwg-722x. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2022-31120 since 05/18/2022. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1562.002.

Upgrading to version 22.2.7, 23.0.4 or 24.0.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Server

Version

• 22.2.0
• 22.2.1
• 22.2.2
• 22.2.3
• 22.2.4
• 22.2.5
• 22.2.6
• 23.0.0
• 23.0.1
• 23.0.2
• 23.0.3

License

• open-source

Website

• Product: https://github.com/nextcloud/server/

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