Nextcloud Mail up to 1.14.x/2.2.1 host server-side request forgery

Summaryinfo

A vulnerability was found in Nextcloud Mail up to 1.14.x/2.2.1. It has been rated as critical. The affected element is an unknown function. The manipulation of the argument host leads to server-side request forgery. This vulnerability is referenced as CVE-2023-23943. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Nextcloud Mail up to 1.14.x/2.2.1 (Cloud Software) and classified as critical. This issue affects an unknown function. The manipulation of the argument host with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Nextcloud mail is an email app for the nextcloud home server platform. In affected versions the SMTP, IMAP and Sieve host fields allowed to scan for internal services and servers reachable from within the local network of the Nextcloud Server. It is recommended that the Nextcloud Maill app is upgraded to 1.15.0 or 2.2.2. The only known workaround for this issue is to completely disable the nextcloud mail app.

The weakness was published 02/07/2023 as GHSA-8gcx-r739-9pf6. The advisory is shared at github.com. The identification of this vulnerability is CVE-2023-23943 since 01/19/2023. Technical details are known, but no exploit is available.

Upgrading to version 1.15.0 or 2.2.2 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

• Mail

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 2.2.0
• 2.2.1

License

• open-source

Website

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

CPE 2.3info

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CPE 2.2info

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• 🔍
• 🔍

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Entryinfo

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