Nextcloud Server up to 28.0.11/29.0.8/30.0.1 cleartext storage

Summaryinfo

A vulnerability was found in Nextcloud Server up to 28.0.11/29.0.8/30.0.1 and classified as problematic. This affects an unknown part. Such manipulation leads to cleartext storage. This vulnerability is uniquely identified as CVE-2024-52525. The attack can be executed directly on the physical device. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Nextcloud Server up to 28.0.11/29.0.8/30.0.1 and classified as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a cleartext storage vulnerability. Using CWE to declare the problem leads to CWE-312. The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere. Impacted is confidentiality. CVE summarizes:

Nextcloud Server is a self hosted personal cloud system. Under certain conditions the password of a user was stored unencrypted in the session data. The session data is encrypted before being saved in the session storage (Redis or disk), but it would allow a malicious process that gains access to the memory of the PHP process, to get access to the cleartext password of the user. It is recommended that the Nextcloud Server is upgraded to 28.0.12, 29.0.9 or 30.0.2.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2024-52525 since 11/11/2024. The exploitation is known to be difficult. The attack needs to be approached locally. Additional levels of successful authentication are required for exploitation. 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 T1555.

Upgrading to version 28.0.12, 29.0.9 or 30.0.2 eliminates this vulnerability. Applying the patch d25a0a2896a2a981939cacb8ee0d555feef22b3b 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
• 28.0.11
• 29.0.0
• 29.0.1
• 29.0.2
• 29.0.3
• 29.0.4
• 29.0.5
• 29.0.6
• 29.0.7
• 29.0.8
• 30.0.0
• 30.0.1

License

• open-source

Website

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

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