CVE-2022-24838: Command Injection in Appointment Emails for Nextcloud Calendar
Nextcloud Calendar is a calendar application for the nextcloud framework. SMTP Command Injection in Appointment Emails via Newlines: as newlines and special characters are not sanitized in the email value in the JSON request, a malicious attacker can inject newlines to break out of the RCPT TO:<BOOKING USER'S EMAIL> SMTP command and begin injecting arbitrary SMTP commands. It is recommended that Calendar is upgraded to 3.2.2. There are no workaround available.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is CVE-2022-24838?
CVE-2022-24838 is a vulnerability in Nextcloud Calendar that allows for SMTP command injection through newlines in appointment emails.
What is the severity of CVE-2022-24838?
The severity of CVE-2022-24838 is critical with a CVSS score of 9.8.
How does CVE-2022-24838 affect Nextcloud Calendar?
CVE-2022-24838 affects Nextcloud Calendar version 3.2.2 and lower.
How can CVE-2022-24838 be exploited?
CVE-2022-24838 can be exploited by injecting newlines into the email value of a JSON request, allowing malicious commands to be executed.
Is there a fix for CVE-2022-24838?
Yes, a fix for CVE-2022-24838 has been released. It is recommended to update to a version that includes the fix.