QID 671129

Dovecot is an imap server for linux/unix-like systems, written with security primarily in mind.
It also contains a small pop3 server.
It supports mail in either of maildir or mbox formats.
The sql drivers and authentication plug-ins are in their subpackages.
Security fix(es): in dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2 (and pigeonhole before 0.5.7.2), protocol processing can fail for quoted strings.
This occurs because '\0' characters are mishandled, and can lead to out-of-bounds writes and remote code execution.(cve-2019-11500) a specially crafted email delivered over smtp and passed on to dovecot by mta can trigger an out of bounds read resulting in potential sensitive information disclosure and denial of service.
In order to trigger this vulnerability, an attacker needs to send a specially crafted email message to the server.(cve-2017-14461) a denial of service flaw was found in dovecot before 2.2.34.
An attacker able to generate random sni server names could exploit tls sni configuration lookups, leading to excessive memory usage and the process to restart.(cve-2017-15130)

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

An arbitrary attacker may exploit this vulnerability to compromise the system.