CVE-2022-31014 SMTP Command Injection in iCalendar Attachments to emails via newlines in Nextcloud Server
Attackers can inject SMTP commands via newlines in iCalendar attachments, hijacking email sessions to send unauthorized emails or modify sender details.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2022-31014?
CVE-2022-31014 is a medium-severity command injection vulnerability in Nextcloud Nextcloud Server, published on 5 Jul 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2022-31014?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2022-31014?
No fix has been published for CVE-2022-31014 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2022-31014 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31014 exists.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-264h-3v4w-6xh2.