CVE-2022-31014: SMTP Command Injection in iCalendar Attachments to emails via newlines in Nextcloud Server
First published: Tue Jul 05 2022(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nextcloud Nextcloud Server | <19.0.13.7 | |
| Nextcloud Nextcloud Server | <22.2.8 | |
| Nextcloud Nextcloud Server | >=20.0.0<20.0.14.6 | |
| Nextcloud Nextcloud Server | >=21.0.0<21.0.9.5 | |
| Nextcloud Nextcloud Server | >=23.0.0<23.0.5 | |
| Nextcloud Nextcloud Server | =24.0.0 | |
| Nextcloud Nextcloud Server | =24.0.0-beta1 | |
| Nextcloud Nextcloud Server | =24.0.0-beta2 | |
| Nextcloud Nextcloud Server | =24.0.0-beta3 | |
| Nextcloud Nextcloud Server | =24.0.0-rc1 | |
| Nextcloud Nextcloud Server | =24.0.0-rc2 | |
| Nextcloud Nextcloud Server | =24.0.0-rc3 |
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Reference Links
Frequently Asked Questions
What is CVE-2022-31014?
CVE-2022-31014 is a vulnerability in the Nextcloud server, where affected versions are vulnerable to SMTP command injection.
What is the impact of CVE-2022-31014?
The impact of CVE-2022-31014 varies based on the commands supported by the backend SMTP server, but the main risk is that the attacker can hijack an already-authenticated session or perform unauthorized actions.
Which versions of Nextcloud server are affected by CVE-2022-31014?
Nextcloud server versions up to 19.0.13.7, 22.2.8, 20.0.0 to 20.0.14.6, 21.0.0 to 21.0.9.5, and 23.0.0 to 23.0.5 are affected by CVE-2022-31014.
What is the severity of CVE-2022-31014?
CVE-2022-31014 has a severity score of 3.5 out of 10, which is considered medium.
How can I fix CVE-2022-31014?
To fix CVE-2022-31014, it is recommended to update Nextcloud server to a version that includes the fix, which can be found in the official Nextcloud security advisories.
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- version/nextcloud nextcloud server/24.0.0-beta1
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