Vulnerability · Published Apr 11, 2022 · Assigned by GitHub_M

CVE-2022-24838Command Injection in Appointment Emails for Nextcloud Calendar

Medium 5.3

In plain English

A medium-severity injection in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 33.0% (higher than 98% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)33.0%top 1.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	< 3.2.2

Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8xv5-4855-24qf x_refsource_CONFIRM
https://github.com/nextcloud/calendar/pull/4073 x_refsource_MISC
https://github.com/nextcloud/calendar/commit/7b70edfb8a0fcf0926f613ababcbd56c6ecd9f35 x_refsource_MISC