Several vulnerabilities were discovered in the Dovecot email server, which could cause crashes in the submission, submission-login or lmtp services, resulting in denial of service.

For the stable distribution (buster), these problems have been fixed in version 1:2.3.4.1-5+deb10u2.

We recommend that you upgrade your dovecot packages.

For the detailed security status of dovecot please refer to its security tracker page at: https://security-tracker.debian.org/tracker/dovecot