This update for dovecot23 fixes the following issues:
Security issues fixed:
- CVE-2020-12100: Fixed a resource exhaustion caused by deeply nested MIME parts (bsc#1174920). - CVE-2020-12673: Fixed an improper implementation of NTLM that did not check the message buffer size (bsc#1174922). - CVE-2020-12674: Fixed an improper implementation of the RPA mechanism (bsc#1174923). - CVE-2020-24386: Fixed an issue with IMAP hibernation that allowed users to access other users' emails (bsc#1180405). - CVE-2020-25275: Fixed a crash when the 10000th MIME part was message/rfc822 (bsc#1180406).
Non-security issues fixed:
- Pigeonhole was updated to version 0.5.11. - Dovecot was updated to version 2.3.11.3.