This update for dovecot23 to 2.3.10 fixes the following issues:
Security issues fixed:
- CVE-2020-10957: Fixed a crash caused by malformed NOOP commands (bsc#1171457). - CVE-2020-10958: Fixed a use-after-free when receiving too many newlines (bsc#1171458). - CVE-2020-10967: Fixed a crash in the lmtp and submission components caused by mails with empty quoted localparts (bsc#1171456).
Non-security issues fixed:
- The update to 2.3.10 fixes several bugs. Please refer to https://dovecot.org/doc/NEWS for a complete list of changes.