Hi all!
We are pleased to release v2.3.21 of Dovecot.
https://dovecot.org/releases/2.3/dovecot-2.3.21.tar.gz
https://dovecot.org/releases/2.3/dovecot-2.3.21.tar.gz.sig
Binary packages in https://repo.dovecot.org/
Docker images in https://hub.docker.com/r/dovecot/dovecot
Regards,
Aki Tuomi
Open-Xchange oy
---
* lib-oauth2: Allow JWT tokens to be validated with missing typ field.
The typ field is left out by some key issuers to conserve space,
notably kubernetes. Now missing typ is tolerated, but if present, it
still must be "jwt".
+ auth: Auth passdb and userdb reply can contain "event_=value"
which will be added to login event and mail user event respectively.
+ lib-master: Set process title during various initialization stages to
clearly describe what the process is waiting on.
+ lib-storage: The mail_temp_scan_interval is now fuzzed incrementing it
by 0..30% based on username's hash to reduce the chance of load spikes
.
+ lib-storage: The temp file scan has been moved from the open of the
mailbox to the close, to reduce the latency perceived by users.
+ stats: If metric has fields specified, all these fields are
exported as counters to prometheus exposition.
See https://doc.dovecot.org/configuration_manual/stats/openmetrics/.
- *-login: Processes might have crashed when a SSL connection disconnect
s
uncleanly.
- acl: When plugin was loaded \HasChildren and \HasNoChildren flags
were calculated incorrectly for mailboxes containing '*' and '%'
in their names.
- auth: Crash occured if a connection to PostgreSQL database server
failed during startup.
- auth: Logins with invalid passwords (e.g. unknown scheme) in passdb
were failing with "password mismatch" instead of "internal error".
- auth: XOAUTH2 and OAUTHBEARER mechanisms were not giving out protocol
specific error message on all errors. This especially broke OIDC
discovery.
- dbox: When last_temp_file_scan header wasn't set (especially after
dsync migration), the next mailbox open always triggers the temp file
scan. This could have caused a load spike after migrations. Fixed by
using the mailbox directory's atime when the header isn't set, which
usually moves the scan time into the future.
- dict-redis: A crash would occur on transaction rollback.
- dsync: Infinite loop causing out of memory would occur when handling
mailbox deletion from remote end and hierarchy separators would differ.
- dsync: Incremental dsync failed for folder names ending with '%',
unless BROKENCHAR was set. Also folder names with '%' elsewhere in
them caused each incremental dsync to unnecessarily rename the folder
to a temporary name and back. v2.3.19 regression.
- imap-hibernate: If an IMAP client unhibernation timed out with
"(version received)", the unhibernation could still have successfully
finished later on and continued working normally. This was rather
confusing, because imap-hibernate already logged that the client got
disconnected. Avoid this by forcing the connection to shutdown on
unhibernation timeout.
- imapc: Crashed when a folder mapped through the virtual plugin
disappears from the storage.
- imapc: EXPUNGE, EXISTS or FETCH replies from a server for a previously
selected mailbox could have been processed as if they belonged to the
new mailbox currently being selected. This could have caused warnings.
- lib-http: Dovecot HTTP server (doveadm, stats/openmetrics) may have
disconnected HTTP clients before the response is fully sent. This
happened only on busy servers where kernel's socket buffers were
rather full.
- lib-http: Fixed a potential crash on http-server if a client
disconnected early. v2.3.18 regression.
- lib-index: Index file corruption could have caused a crash. Fixes:
Panic: file mail-transaction-log-view.c: line 165
(mail_transaction_log_view_set):
assertion failed: (min_file_seq <= max_file_seq).
- lib-index: Purging an existing >1GB cache file can crash. Now cache
files still above 1GB after purging are removed. Fixes:
Panic: file mail-index-util.c: line 10 (mail_index_uint32_to_offset):
assertion failed: (offset < 0x4000)
- lib-lua: A HTTP client could not resolve DNS names in mail processes,
because it expected "the dns-client" socket to exist in the current
directory.
- lib-oauth2: Dovecot would send client_id and client_secret as POST
parameters to the introspection server. These need to be optionally in
Basic auth instead.
- lib-oauth2: JWT aud validation was not performed if aud was missing
from a token, but was configured on Dovecot.
- lib-oauth2: JWT key type check was too strict.
- lib-oauth2: JWT token audience was not validated against client_id as
required by the specification.
- lib-ssl-iostream: Using the ssl_require_crl=yes setting may have caused
CRL check failures for outgoing SSL/TLS connections, although it was
supposed to affect checking CRLs only for client-side SSL
certificates. v2.3.17 regression.
- lib-sql: MySQL
