Nextcloud Server up to 23.0.10/24.0.6 Password Length resource consumption

Summaryinfo

A vulnerability marked as problematic has been reported in Nextcloud Server up to 23.0.10/24.0.6. This affects an unknown part of the component Password Length Handler. This manipulation causes resource consumption. This vulnerability is registered as CVE-2022-41969. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Nextcloud Server up to 23.0.10/24.0.6 (Cloud Software) and classified as problematic. Affected by this vulnerability is an unknown code of the component Password Length Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

Nextcloud Server is an open source personal cloud server. Prior to versions 23.0.11, 24.0.7, and 25.0.0, there is no password length limit when creating a user as an administrator. An administrator can cause a limited DoS attack against their own server. Versions 23.0.11, 24.0.7, and 25.0.0 contain a fix for the issue. As a workaround, don't create user accounts with long passwords.

The weakness was published 12/02/2022 as GHSA-4gm7-j7wg-m4fx. The advisory is shared at github.com. This vulnerability is known as CVE-2022-41969 since 09/30/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 23.0.11, 24.0.7 or 25.0.0 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.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Server

Version

• 23.0.0
• 23.0.1
• 23.0.2
• 23.0.3
• 23.0.4
• 23.0.5
• 23.0.6
• 23.0.7
• 23.0.8
• 23.0.9
• 23.0.10
• 24.0.0
• 24.0.1
• 24.0.2
• 24.0.3
• 24.0.4
• 24.0.5
• 24.0.6

License

• open-source

Website

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

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CPE 2.2info

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