Nextcloud Server up to 28.0.10/29.0.7/30.0.0 information disclosure

Summaryinfo

A vulnerability was found in Nextcloud Server up to 28.0.10/29.0.7/30.0.0. It has been classified as problematic. The affected element is an unknown function. The manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2024-52517. It is possible to launch the attack on the physical device. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Nextcloud Server up to 28.0.10/29.0.7/30.0.0. This issue affects an unknown code block. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

Nextcloud Server is a self hosted personal cloud system. After storing "Global credentials" on the server, the API returns them and adds them into the frontend again, allowing to read them in plain text when an attacker already has access to an active session of a user. It is recommended that the Nextcloud Server is upgraded to 28.0.11, 29.0.8 or 30.0.1 and Nextcloud Enterprise Server is upgraded to 25.0.13.13, 26.0.13.9, 27.1.11.9, 28.0.11, 29.0.8 or 30.0.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2024-52517 since 11/11/2024. The exploitation is known to be difficult. Attacking locally is a requirement. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 28.0.11, 29.0.8 or 30.0.1 eliminates this vulnerability. Applying the patch c45ed55f959ff54f3ea23dd2ae1a5868a075c9fe 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

• Server

Version

• 28.0.0
• 28.0.1
• 28.0.2
• 28.0.3
• 28.0.4
• 28.0.5
• 28.0.6
• 28.0.7
• 28.0.8
• 28.0.9
• 28.0.10
• 29.0.0
• 29.0.1
• 29.0.2
• 29.0.3
• 29.0.4
• 29.0.5
• 29.0.6
• 29.0.7
• 30.0

License

• open-source

Website

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

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