Nextcloud Richdocuments up to 6.3.1/7.0.1 Internal API Endpoint access control

Summaryinfo

A vulnerability identified as critical has been detected in Nextcloud Richdocuments up to 6.3.1/7.0.1. Affected by this issue is some unknown functionality of the component Internal API Endpoint. Performing a manipulation results in access control. This vulnerability is cataloged as CVE-2023-28645. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Nextcloud Richdocuments up to 6.3.1/7.0.1 (Cloud Software). It has been classified as problematic. This affects some unknown functionality of the component Internal API Endpoint. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality. The summary by CVE is:

Nextcloud richdocuments is a Nextcloud app integrating the office suit Collabora Online. In affected versions the secure view feature of the rich documents app can be bypassed by using unprotected internal API endpoint of the rich documents app. It is recommended that the Nextcloud Office app (richdocuments) is upgraded to 8.0.0-beta.1, 7.0.2 or 6.3.2. Users unable to upgrade may mitigate the issue by taking steps to restrict the ability to download documents. This includes ensuring that the `WOPI configuration` is configured to only serve documents between Nextcloud and Collabora. It is highly recommended to define the list of Collabora server IPs as the allow list within the Office admin settings of Nextcloud.

The weakness was shared 04/01/2023 as GHSA-95j6-p5cj-5hh5. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-28645 since 03/20/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 6.3.2, 7.0.2 or 8.0.0-beta.1 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.

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Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Richdocuments

Version

• 6.3.0
• 6.3.1
• 7.0.0
• 7.0.1

License

• open-source

Website

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

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