=========================================================================Ubuntu Security Notice USN-5509-1
July 11, 2022

dovecot vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Dovecot could allow unintended access to network services.

Software Description:
- dovecot: IMAP and POP3 email server

Details:

Julian Brook discovered that Dovecot incorrectly handled multiple passdb
configuration entries. In certain configurations, a remote attacker could
possibly use this issue to escalate privileges.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
  dovecot-core                    1:2.3.16+dfsg1-3ubuntu2.1

Ubuntu 21.10:
  dovecot-core                    1:2.3.13+dfsg1-1ubuntu3.1

Ubuntu 20.04 LTS:
  dovecot-core                    1:2.3.7.2-1ubuntu3.6

Ubuntu 18.04 LTS:
  dovecot-core                    1:2.2.33.2-1ubuntu4.8

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5509-1
  CVE-2022-30550

Package Information:
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.16+dfsg1-3ubuntu2.1
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.13+dfsg1-1ubuntu3.1
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.7.2-1ubuntu3.6
  https://launchpad.net/ubuntu/+source/dovecot/1:2.2.33.2-1ubuntu4.8