Nextcloud Server/Enterprise Server up to 27.1.0 Birthday Calendar authorization

Summaryinfo

A vulnerability identified as problematic has been detected in Nextcloud Server and Enterprise Server up to 27.1.0. This impacts an unknown function of the component Birthday Calendar Handler. This manipulation causes authorization. This vulnerability is tracked as CVE-2023-48304. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Nextcloud Server and Enterprise Server up to 27.1.0 (Cloud Software) and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Birthday Calendar Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect availability. The summary by CVE is:

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, an attacker could enable and disable the birthday calendar for any user on the same server. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.

The weakness was disclosed 11/22/2023 as GHSA-8jwv-c8c8-9fr3. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-48304 since 11/14/2023. The technical details are unknown and an exploit is not publicly available.

Upgrading 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.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Enterprise Server
• Server

Version

• 22.2.10.0
• 22.2.10.1
• 22.2.10.2
• 22.2.10.3
• 22.2.10.4
• 22.2.10.5
• 22.2.10.6
• 22.2.10.7
• 22.2.10.8
• 22.2.10.9
• 22.2.10.10
• 22.2.10.11
• 22.2.10.12
• 22.2.10.13
• 22.2.10.14
• 22.2.10.15
• 22.2.10.16
• 23.0.12.0
• 23.0.12.1
• 23.0.12.2
• 23.0.12.3
• 23.0.12.4
• 23.0.12.5
• 23.0.12.6
• 23.0.12.7
• 23.0.12.8
• 23.0.12.9
• 23.0.12.10
• 23.0.12.11
• 24.0.12.0
• 24.0.12.1
• 24.0.12.2
• 24.0.12.3
• 24.0.12.4
• 24.0.12.5
• 24.0.12.6
• 24.0.12.7
• 25.0.0
• 25.0.1
• 25.0.2
• 25.0.3
• 25.0.4
• 25.0.5
• 25.0.6
• 25.0.7
• 25.0.8
• 25.0.9
• 25.0.10
• 25.0.11
• 26.0.0
• 26.0.1
• 26.0.2
• 26.0.3
• 26.0.4
• 26.0.5
• 26.0.6
• 27.0
• 27.1.0

License

• open-source

Website

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

CPE 2.3info

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CPE 2.2info

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