CVE-2022-31014 Information

Description

Nextcloud server is an open source personal cloud server. Affected versions were found to be vulnerable to SMTP command injection. The impact varies based on which commands are supported by the backend SMTP server. However the main risk here is that the attacker can then hijack an already-authenticated SMTP session and run arbitrary SMTP commands as the email user such as sending emails to other users changing the FROM user and so on. As before this depends on the configuration of the server itself but newlines should be sanitized to mitigate such arbitrary SMTP command injection. It is recommended that the Nextcloud Server is upgraded to 22.2.8 23.0.5 or 24.0.1. There are no known workarounds for this issue.

Reference

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-264h-3v4w-6xh2 https://hackerone.com/reports/1516377 https://github.com/nextcloud/server/pull/32428