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v2.3.9.2 2019-12-13 Aki Tuomi <aki.tuomi@open-xchange.com>
- Mails with empty From/To headers can also cause crash
in push notification drivers.
v2.3.9.1 2019-12-13 Aki Tuomi <aki.tuomi@open-xchange.com>
* CVE-2019-19722: Mails with group addresses in From or To fields
caused crash in push notification drivers.
v2.3.9 2019-12-04 Aki Tuomi <aki.tuomi@open-xchange.com>
* Changed several event field names for consistency and to avoid
conflicts in parent-child event relationships:
* SMTP server command events: Renamed "name" to "cmd_name"
* Events inheriting from a mailbox: Renamed "name" to "mailbox"
* Server connection events have only "remote_ip", "remote_port",
"local_ip" and "local_port".
* Removed duplicate "client_ip", "ip" and "port".
* Mail storage events: Removed "service" field.
Use "service:<name>" category instead.
* HTTP client connection events: Renamed "host" to "dest_host" and
"port" to "dest_port"
* auth: Drop Postfix socketmap support. It hasn't been working
with recent Postfix versions for a while now.
* push-notification-lua: The "subject" field is now decoded to UTF8
instead of kept as MIME-encoded.
+ push-notification-lua: Added new "from_address", "from_display_name",
"to_address" and "to_display_name" fields. The display names are
decoded to UTF8.
+ Added various new fields to existing events.
See http://doc.dovecot.net/admin_manual/list_of_events.html
+ Add lmtp_add_received_header setting. It can be used to prevent LMTP
from adding "Received:" headers.
+ doveadm: Support SSL/STARTTLS for proxied doveadm connections based on
doveadm_ssl setting and proxy ssl/tls settings.
+ Log filters support now "service:<name>", which matches all events for
the given service. It can also be used as a category.
+ lib: Use libunwind to get abort backtraces with function names
where available.
+ lmtp: When the LMTP proxy changes the username (from passdb lookup)
add an appropriate ORCPT parameter.
- lmtp: Add lmtp_client_workarounds setting to implement workarounds for
clients that send MAIL and RCPT commands with additional spaces before
the path and for clients that omit <> brackets around the path.
See example-config/conf.d/20-lmtp.conf.
- lda/lmtp: Invalid MAIL FROM addresses were rejcted too aggressively.
Now mails from addresses with unicode characters are delivered, but
their Return-Path header will be <> instead of the given MAIL FROM
address.
- lmtp: The lmtp_hdr_delivery_address setting is ignored.
- imap: imap_command_finished event's "args" and "human_args" parameters
were always empty.
- mbox: Seeking in zlib and bzip2 compressed input streams didn't work
correctly.
- imap-hibernate: Process crashed when client got destroyed while it was
attempted to be unhibernated, and the unhibernation fails.
- *-login: Proxying may have crashed if SSL handshake to the backend
failed immediately. This was unlikely to happen in normal operation.
- *-login: If TLS handshake to upstream server failed during proxying,
login process could crash due to invalid memory access.
- *-login: v2.3 regression: Using SASL authentication without initial
response may have caused SSL connections to hang. This happened often
at least with PHP's IMAP library.
- *-login: When login processes are flooded with authentication attempts
it starts logging errors about "Authentication server sent unknown id".
This is still expected. However, it also caused the login process to
disconnect from auth server and potentially log some user's password
in the error message.
- dict-sql: SQL prepared statements were not shared between sessions.
This resulted in creating a lot of prepared statements, which was
especially inefficient when using Cassandra backend with a lot of
Cassandra nodes.
- auth: auth_request_finished event didn't have success=yes parameter
set for successful authentications.
- auth: userdb dict - Trying to list users crashed.
- submission: Service could be configured to allow anonymous
authentication mechanism and anonymous user access.
- LAYOUT=index: Corrupted dovecot.list.index caused folder creation to
panic.
- doveadm: HTTP server crashes if request target starts with double "/".
- dsync: Remote dsync started hanging if the initial doveadm
"dsync-server" command was sent in the same TCP packet as the
following dsync handshake. v2.3.8 regression.
- lib: Several "input streams" had a bug that in some rare situations
might cause it to access freed memory. This could lead to crashes or
corruption.
The only currently known effect of this is that using zlib plugin with
external mail attachments (mail_attachment_dir) could cause fetching
the mail to return a few bytes of garbage data at the beginning of the
header. Note that the mail wasn't saved corrupted, but fetching it
caused corrupted mail to be sent to the client.
- lib-storage: If a mail only has quoted content, use the quoted text
for generating message snippet (IMAP PREVIEW) instead of returning
empty snippet.
- lib-storage: When vsize header was rebuilt, newly calculated message
sizes were added to dovecot.index.cache instead of being directly
saved into vsize records in dovecot.index.
- lib: JSON generator was escaping UTF-8 characters unnecessarily.
v2.3.8 2019-10-08 Aki Tuomi <aki.tuomi@open-xchange.com>
+ Added mail_delivery_started and mail_delivery_finished events, see
https://doc.dovecot.org/admin_manual/list_of_events/ for details.
+ dsync-replication: Don't replicate users who have "noreplicate" extra
field in userdb.
+ doveadm service status: Show total number of processes created.
+ When logging to syslog, use instance_name setting's value for the
ident. This commonly is added as a log prefix.
+ Base64 encoding/decoding code was rewritten with additional features.
It shouldn't cause any user visible changes.
- v2.3.7 regression: If a folder only receives new mails without any
other mail access, dovecot.index.log keeps growing forever and
dovecot.index keeps being rewritten for every mail delivery.
- dsync-replication may lose keywords after syncing mails restored from
another replica. This only happened if the mail only had keywords and
no system flags.
- event filters: Non-textual event fields could not be filtered using
wildcards.
- auth: Scope parameter was missing from OAuth password grant
request.
- doveadm client-server communication may hang in some situations.
It is also using unnecessarily small TCP/IP packet sizes.
- doveadm who and kick did not flush protocol output correctly.
- imap: SETMETADATA with literal value would delete the metadata value
instead of updating it.
- imap: When client issues FETCH PREVIEW (LAZY=FUZZY) command, the
caching decisions should be updated so that newly saved mails will
have the preview cached.
- With mail_nfs_index=yes and/or mail_nfs_storage=yes setuid/setgid
permission bits in some files may have become dropped with some NFS
servers. Changed NFS flushing to now use chmod() instead of chown().
- quota: warnings did not work if quota root was noenforcing
- acl: Global ACL file ignored the last line if it didn't end with LF.
- doveadm stats dump: With JSON formatter output numbers using the
number type instead of as strings
- lmtp_proxy: Ensure that real_* variables are correctly set when using
lmtp_proxy.
- event exporter: http-post driver had hardcoded timeout and did not
support DNS lookups or TLS connections.
- auth: Fix user iteration to work with userdb passwd with glibc v2.28.
- auth: auth service can crash if auth-policy JSON response is invalid
or returned too fast.
- In some rare situations "ps" output could have shown a lot of "?"
characters after Dovecot process titles.
- When dovecot.index.pvt is empty, an unnecessary error is logged:
Error: .../dovecot.index.pvt reset, view is now inconsistent
- SMTP address encoder duplicated initial double quote character when
the localpart of an address ended in '..'. For example
"user+..@example.com" became ""user+.."@example.com in a
sieve redirect.
v2.3.7.1 2019-07-23 Timo Sirainen <timo.sirainen@open-xchange.com>
- Fix TCP_NODELAY errors being logged on non-Linux OSes
- lmtp proxy: Fix assert-crash when client uses BODY=8BITMIME
- Remove wrongly added checks in namespace prefix checking
v2.3.7 2019-07-12 Aki Tuomi <aki.tuomi@open-xchange.com>
* fts-solr: Removed break-imap-search parameter
+ Added more events for the new statistics, see
https://doc.dovecot.org/admin_manual/list_of_events/
+ mail-lua: Add IMAP metadata accessors, see
https://doc.dovecot.org/admin_manual/lua/
+ Add event exporters that allow exporting raw events to log files and
external systems, see
https://doc.dovecot.org/configuration_manual/event_export/
+ SNIPPET is now PREVIEW and size has been increased to 200 characters.
+ Add body option to fts_enforced. This triggers building FTS index only
on body search, and an error using FTS index fails the search rather
than reads through all the mails.
- Submission/LMTP: Fixed crash when domain argument is invalid in a
second EHLO/LHLO command.
- Copying/moving mails using Maildir format loses IMAP keywords in the
destination if the mail also has no system flags.
- mail_attachment_detection_options=add-flags-on-save caused email body
to be unnecessarily opened when FETCHing mail headers that were
already cached.
- mail attachment detection keywords not saved with maildir.
- dovecot.index.cache may have grown excessively large in some
situations. This happened especially when using autoexpunging with
lazy_expunge folders. Also with mdbox format in general the cache file
wasn't recreated as often as it should have.
- Autoexpunged mails weren't immediately deleted from the disk. Instead,
the deletion from disk happened the next time the folder was opened.
This could have caused unnecessary delays if the opening was done by
an interactive IMAP session.
- Dovecot's TCP connections sometimes add extra 40ms latency due to not
enabling TCP_NODELAY. HTTP and SMTP/LMTP connections weren't
affected, but everything else was. This delay wasn't always visible -
only in some situations with some message/packet sizes.
- imapc: Fix various crash conditions
- Dovecot builds were not always reproducible.
- login-proxy: With shutdown_clients=no after config reload the
existing connections could no longer be listed or kicked with doveadm.
- "doveadm proxy kick" with -f parameter caused a crash in some
situations.
- Auth policy can cause segmentation fault crash during auth process
shutdown if all auth requests have not been finished.
- Fix various minor bugs leading into incorrect behaviour in mailbox
list index handling. These rarely caused noticeable problems.
- LDAP auth: Iteration accesses freed memory, possibly crashing
auth-worker
- local_name { .. } filter in dovecot.conf does not correctly support
multiple names and wildcards were matched incorrectly.
- replicator: dsync assert-crashes if it can't connect to remote TCP
server.
- config: Memory leak in config process when ssl_dh setting wasn't
set and there was no ssl-parameters.dat file.
This caused config process to die once in a while
with "out of memory".
v2.3.6 2019-04-30 Aki Tuomi <aki.tuomi@open-xchange.com>
* CVE-2019-11494: Submission-login crashed with signal 11 due to null
pointer access when authentication was aborted by disconnecting.
* CVE-2019-11499: Submission-login crashed when authentication was
started over TLS secured channel and invalid authentication message
was sent.
* auth: Support password grant with passdb oauth2.
+ Use system default CAs for outbound TLS connections.
+ Simplify array handling with new helper macros.
+ fts_solr: Enable configuring batch_size and soft_commit features.
- lmtp/submission: Fixed various bugs in XCLIENT handling, including a
hang when XCLIENT commands were sent infinitely to the remote server.
- lmtp/submission: Forwarded multi-line replies were erroneously sent
as two replies to the client.
- lib-smtp: client: Message was not guaranteed to contain CRLF
consistently when CHUNKING was used.
- fts_solr: Plugin was no longer compatible with Solr 7.
- Make it possible to disable certificate checking without
setting ssl_client_ca_* settings.
- pop3c: SSL support was broken.
- mysql: Closing connection twice lead to crash on some systems.
- auth: Multiple oauth2 passdbs crashed auth process on deinit.
- HTTP client connection errors infrequently triggered a segmentation
fault when the connection was idle and not used for a particular
client instance.
v2.3.5.2 2019-04-18 Timo Sirainen <tss@iki.fi>
* CVE-2019-10691: Trying to login with 8bit username containing
invalid UTF8 input causes auth process to crash if auth policy is
enabled. This could be used rather easily to cause a DoS. Similar
crash also happens during mail delivery when using invalid UTF8 in
From or Subject header when OX push notification driver is used.
v2.3.5.1 2019-03-28 Timo Sirainen <tss@iki.fi>
* CVE-2019-7524: Missing input buffer size validation leads into
arbitrary buffer overflow when reading fts or pop3 uidl header
from Dovecot index. Exploiting this requires direct write access to
the index files.
v2.3.5 2019-03-05 Timo Sirainen <tss@iki.fi>
+ Lua push notification driver: mail keywords and flags are provided
in MessageNew and MessageAppend events.
+ submission: Implement support for plugins.
+ auth: When auth_policy_log_only=yes, only log what the policy server
response would do without actually doing it.
+ auth: Always log policy server decisions with auth_verbose=yes
- v2.3.[34]: doveadm log errors: Output was missing user/session
- lda: Debug log lines could have shown slightly corrupted
- login proxy: Login processes may have crashed in various ways when
login_proxy_max_disconnect_delay was set.
- imap: Fix crash with Maildir+zlib if client disconnects during APPEND
- lmtp proxy: Fix potential assert-crash
- lmtp/submission: Fix crash when SMTP client transaction times out
- submission: Split large XCLIENT commands to 512 bytes per command,
so Postfix accepts them.
- submission: Fix crash when client sends invalid BURL command
- submission: relay backend: VRFY command: Avoid forwarding 500 and
502 replies back to client.
- lib-http: Fix potential assert-crash when DNS lookup fails
- lib-fts: Fix search query generation when one language ignores a
token (e.g. via stopwords).
v2.3.4 2018-11-23 Timo Sirainen <tss@iki.fi>
* The default postmaster_address is now "postmaster@<user domain or
server hostname>". If username contains the @domain part, that's
used. If not, then the server's hostname is used.
* "doveadm stats dump" now returns two decimals for the "avg" field.
+ Added push notification driver that uses a Lua script
+ Added new SQL, DNS and connection events.
See https://wiki2.dovecot.org/Events
+ Added "doveadm mailbox cache purge" command.
+ Added events API support for Lua scripts
+ doveadm force-resync -f parameter performs "index fsck" while opening
the index. This may be useful to fix some types of broken index files.
This may become the default behavior in a later version.
- director: Kicking a user crashes if login process is very slow
- pop3_no_flag_updates=no: Don't expunge DELEted and RETRed messages
unless QUIT is sent.
- auth: Fix crypt() segfault with glibc-2.28+
- imap: Running UID FILTER script with errors assert-crashes
- dsync, pop3-migration: POP3 UIDLs weren't added to
dovecot.index.cache while mails were saved.
- dict clients may have been using 100% CPU while waiting for dict
server to finish commands.
- doveadm user: Fixed user listing via HTTP API
- All levels of Cassandra log messages were logged as Dovecot errors.
- http/smtp client may have crashed after SSL handshake
- Lua auth converted strings that looked like numbers into numbers.
v2.3.3 2018-10-01 Timo Sirainen <tss@iki.fi>
* doveconf hides more secrets now in the default output.
* ssl_dh setting is no longer enforced at startup. If it's not set and
non-ECC DH key exchange happens, error is logged and client is
disconnected.
+ Added log_debug=<filter> setting.
+ Added log_core_filter=<log filter> setting.
+ quota-clone: Write to dict asynchronously
+ --enable-hardening attempts to use retpoline Spectre 2 mitigations
+ lmtp proxy: Support source_ip passdb extra field.
+ doveadm stats dump: Support more fields and output stddev by default.
+ push-notification: Add SSL support for OX backend.
- NUL bytes in mail headers can cause truncated replies when fetched.
- director: Conflicting host up/down state changes may in some rare
situations ended up in a loop of two directors constantly overwriting
each others' changes.
- director: Fix hang/crash when multiple doveadm commands are being
handled concurrently.
- director: Fix assert-crash if doveadm disconnects too early
- virtual plugin: Some searches used 100% CPU for many seconds
- dsync assert-crashed with acl plugin in some situations.
- mail_attachment_detection_options=add-flags-on-save assert-crashed
with some specific Sieve scripts.
- Mail snippet generation crashed with mails containing invalid
Content-Type:multipart header.
- Log prefix ordering was different for some log lines.
- quota: With noenforcing option current quota usage wasn't updated.
- auth: Kerberos authentication against Samba assert-crashed.
- stats clients were unnecessarily chatty with the stats server.
- imapc: Fixed various assert-crashes when reconnecting to server.
- lmtp, submission: Fix potential crash if client disconnects while
handling a command.
- quota: Fixed compiling with glibc-2.26 / support libtirpc.
- fts-solr: Empty search values resulted in 400 Bad Request errors
- fts-solr: default_ns parameter couldn't be used
- submission server crashed if relay server returned over 7 lines in
a reply (e.g. to EHLO)
v2.3.2.1 2018-07-09 Timo Sirainen <tss@iki.fi>
- SSL/TLS servers may have crashed during client disconnection
- lmtp: With lmtp_rcpt_check_quota=yes mail deliveries may have
sometimes assert-crashed.
- v2.3.2: "make check" may have crashed with 32bit systems
v2.3.2 2018-06-29 Timo Sirainen <tss@iki.fi>
* old-stats plugin: Don't temporarily enable PR_SET_DUMPABLE while
opening /proc/self/io. This may still cause security problems if the
process is ptrace()d at the same time. Instead, open it while still
running as root.
+ doveadm: Added mailbox cache decision&remove commands. See
doveadm-mailbox(1) man page for details.
+ doveadm: Added rebuild attachments command for rebuilding
$HasAttachment or $HasNoAttachment flags for matching mails. See
doveadm-rebuild(1) man page for details.
+ cassandra: Use fallback_consistency on more types of errors
+ lmtp proxy: Support outgoing SSL/TLS connections
+ lmtp: Add lmtp_rawlog_dir and lmtp_proxy_rawlog_dir settings.
+ submission: Add support for rawlog_dir
+ submission: Add submission_client_workarounds setting.
+ lua auth: Add password_verify() function and additional fields in
auth request.
- doveadm-server: TCP connections are hanging when there is a lot of
network output. This especially caused hangs in dsync-replication.
- Using multiple type=shared mdbox namespaces crashed
- mail_fsync setting was ignored. It was always set to "optimized".
- lua auth: Fix potential crash at deinit
- SSL/TLS servers may have crashed if client disconnected during
handshake.
- SSL/TLS servers: Don't send extraneous certificates to client when
alt certs are used.
- lda, lmtp: Return-Path header without '<' may have assert-crashed.
- lda, lmtp: Unencoded UTF-8 in email address headers may assert-crash
- lda: -f parameter didn't allow empty/null/domainless address
- lmtp, submission: Message size limit was hardcoded to 40 MB.
Exceeding it caused the connection to get dropped during transfer.
- lmtp: Fix potential crash when delivery fails at DATA stage
- lmtp: login_greeting setting was ignored
- Fix to work with OpenSSL v1.0.2f
- systemd unit restrictions were too strict by default
- Fix potential crashes when a lot of log output was produced
- SMTP client may have assert-crashed when sending mail
- IMAP COMPRESS: Send "end of compression" marker when disconnecting.
- cassandra: Fix consistency=quorum to work
- dsync: Lock file generation failed if home directory didn't exist
- Snippet generation for HTML mails didn't ignore &entities inside
blockquotes, producing strange looking snippets.
- imapc: Fix assert-crash if getting disconnected and after
reconnection all mails in the selected mailbox are gone.
- pop3c: Handle unexpected server disconnections without assert-crash
- fts: Fixes to indexing mails via virtual mailboxes.
- fts: If mails contained NUL characters, the text around it wasn't
indexed.
- Obsolete dovecot.index.cache offsets were sometimes used. Trying to
fetch a field that was just added to cache file may not have always
found it.
v2.3.1 2018-02-29 Aki Tuomi <aki.tuomi@dovecot.fi>
* Submission server support improvements and bug fixes
- Lots of bug fixes to submission server
* API CHANGE: array_idx_modifiable will no longer allocate space
- Particularly affects how you should check MODULE_CONTEXT result, or
use REQUIRE_MODULE_CONTEXT.
+ mail_attachment_detection_options setting controls when
$HasAttachment and $HasNoAttachment keywords are set for mails.
+ imap: Support fetching body snippets using FETCH (SNIPPET) or
(SNIPPET (LAZY=FUZZY))
+ fs-compress: Automatically detect whether input is compressed or not.
Prefix the compression algorithm with "maybe-" to enable the
detection, for example: "compress:maybe-gz:6:..."
+ Added settings to change dovecot.index* files' optimization behavior.
See https://wiki2.dovecot.org/IndexFiles#Settings
+ Auth cache can now utilize auth workers to do password hash
verification by setting auth_cache_verify_password_with_worker=yes.
+ Added charset_alias plugin. See
https://wiki2.dovecot.org/Plugins/CharsetAlias
+ imap_logout_format and pop3_logout_format settings now support all of
the generic variables (e.g. %{rip}, %{session}, etc.)
+ Added auth_policy_check_before_auth, auth_policy_check_after_auth
and auth_policy_report_after_auth settings.
+ master: Support HAProxy PP2_TYPE_SSL command and set "secured"
variable appropriately
- Invalid UCS4 escape in HTML can cause crashes
- imap: IMAP COMPRESS -enabled clietn crashes on disconnect
- lmtp: Fix crash when user is over quota
- lib-lda: Parsing Return-Path header address fails when it contains
CFWS
- auth: SASL with Exim fails for AUTH commands without an initial
response
- imap: SPECIAL-USE capability isn't automatically added
- auth: LDAP subqueries do not support standard auth variables in
var-expand
- auth: SHA256-CRYPT and SHA512-CRYPT schemes do not work
- lib-index: mail_always/never_cache_fields are not used for existing
cache files
- imap: Fetching headers leaks memory if search doesn't find any mails
- lmtp: ORCPT support in RCPT TO
- imap-login: Process sometimes ends up in infinite loop
- sdbox: Rolled back save/copy transaction doesn't delete temp files
- mail: lock_method=dotlock causes crashes
v2.3.0.1 2018-02-28 Timo Sirainen <tss@iki.fi>
* CVE-2017-15130: TLS SNI config lookups may lead to excessive
memory usage, causing imap-login/pop3-login VSZ limit to be reached
and the process restarted. This happens only if Dovecot config has
local_name { } or local { } configuration blocks and attacker uses
randomly generated SNI servernames.
* CVE-2017-14461: Parsing invalid email addresses may cause a crash or
leak memory contents to attacker. For example, these memory contents
might contain parts of an email from another user if the same imap
process is reused for multiple users. First discovered by Aleksandar
Nikolic of Cisco Talos. Independently also discovered by "flxflndy"
via HackerOne.
* CVE-2017-15132: Aborted SASL authentication leaks memory in login
process.
* Linux: Core dumping is no longer enabled by default via
PR_SET_DUMPABLE, because this may allow attackers to bypass
chroot/group restrictions. Found by cPanel Security Team. Nowadays
core dumps can be safely enabled by using "sysctl -w
fs.suid_dumpable=2". If the old behaviour is wanted, it can still be
enabled by setting:
import_environment=$import_environment PR_SET_DUMPABLE=1
- imap-login with SSL/TLS connections may end up in infinite loop
v2.3.0 2017-12-22 Timo Sirainen <tss@iki.fi>
* Various setting changes, see https://wiki2.dovecot.org/Upgrading/2.3
* Logging rewrite started: Logging is now based on hierarchical events.
This makes it possible to do various things, like: 1) giving
consistent log prefixes, 2) enabling debug logging with finer
granularity, 3) provide logs in more machine readable formats
(e.g. json). Everything isn't finished yet, especially a lot of the
old logging code still needs to be translated to the new way.
* Statistics rewrite started: Stats are now based on (log) events.
It's possible to gather statistics about any event that is logged.
See http://wiki2.dovecot.org/Statistics for details
* ssl_dh setting replaces the old generated ssl-parameters.dat
* IMAP: When BINARY FETCH finds a broken mails, send [PARSE] error
instead of [UNKNOWNCTE]
* Linux: core dumping via PR_SET_DUMPABLE is no longer enabled by
default due to potential security reasons (found by cPanel Security
Team).
+ Added support for SMTP submission proxy server, which includes
support for BURL and CHUNKING extension.
+ LMTP rewrite. Supports now CHUNKING extension and mixing of
local/proxy recipients.
+ auth: Support libsodium to add support for ARGON2I and ARGON2ID
password schemes.
+ auth: Support BLF-CRYPT password scheme in all platforms
+ auth: Added LUA scripting support for passdb/userdb.
See https://wiki2.dovecot.org/AuthDatabase/Lua
- Input streams are more reliable now when there are errors or when
the maximum buffer size is reached. Previously in some situations
this could have caused Dovecot to try to read already freed memory.
- Output streams weren't previously handling failures when writing a
trailer at the end of the stream. This mainly affected encrypt and
zlib compress ostreams, which could have silently written truncated
files if the last write happened to fail (which shouldn't normally
have ever happened).
- virtual plugin: Fixed panic when fetching mails from virtual
mailboxes with IMAP BINARY extension.
- doveadm-server: Fix potential hangs with SSL connections
- doveadm proxy: Reading commands' output from v2.2.33+ servers could
have caused the output to be corrupted or caused a crash.
- Many other smaller fixes
v2.2.36.3 2019-03-28 Timo Sirainen <tss@iki.fi>
* CVE-2019-7524: Missing input buffer size validation leads into
arbitrary buffer overflow when reading fts or pop3 uidl header
from Dovecot index. Exploiting this requires direct write access to
the index files.
v2.2.36.1 2019-02-05 Timo Sirainen <tss@iki.fi>
* CVE-2019-3814: If imap/pop3/managesieve/submission client has
trusted certificate with missing username field
(ssl_cert_username_field), under some configurations Dovecot
mistakenly trusts the username provided via authentication instead
of failing.
* ssl_cert_username_field setting was ignored with external SMTP AUTH,
because none of the MTAs (Postfix, Exim) currently send the
cert_username field. This may have allowed users with trusted
certificate to specify any username in the authentication. This bug
didn't affect Dovecot's Submission service.
- pop3_no_flag_updates=no: Don't expunge RETRed messages without QUIT
- director: Kicking a user assert-crashes if login process is very slow
- lda/lmtp: Fix assert-crash with some Sieve scripts when
mail_attachment_detection_options=add-flags-on-save
- fs-compress: Using maybe-gz assert-crashed when reading 0 sized file
- Snippet generation crashed with invalid Content-Type:multipart
v2.2.36 2018-05-23 Timo Sirainen <tss@iki.fi>
* login-proxy: If ssl_require_crl=no, allow revoked certificates.
Also don't do CRL checks for incoming client certificates.
* stats plugin: Don't temporarily enable PR_SET_DUMPABLE while opening
/proc/self/io. This may still cause security problems if the process
is ptrace()d at the same time. Instead, open it while still running
as root.
+ doveadm: Added mailbox cache decision&remove commands. See
doveadm-mailbox(1) man page for details.
+ doveadm: Added rebuild attachments command for rebuilding
$HasAttachment or $HasNoAttachment flags for matching mails. See
doveadm-rebuild(1) man page for details.
+ cassandra: Use fallback_consistency on more types of errors
- cassandra: Fix consistency=quorum to work
- dsync: Lock file generation failed if home directory didn't exist
- In some configs if namespace root directory didn't yet exist, Dovecot
failed to create mailboxes.lock when trying to create mailboxes
- Snippet generation for HTML mails didn't ignore &entities inside
blockquotes, producing strange looking snippets.
- imapc: Fix assert-crash if getting disconnected and after
reconnection all mails in the selected mailbox are gone.
- pop3c: Handle unexpected server disconnections without assert-crash
- fts: Fixes to indexing mails via virtual mailboxes.
- fts: If mails contained NUL characters, the text around it wasn't
indexed.
- Obsolete dovecot.index.cache offsets were sometimes used. Trying to
fetch a field that was just added to cache file may not have always
found it.
- dict-sql: Fix crash when reading NULL value from database
v2.2.35 2018-03-19 Aki Tuomi <aki.tuomi@dovecot.fi>
- charset_alias: compile fails with Solaris Studio, reported by
John Woods.
- Fix local name handling in v2.2.34 SNI code, bug found by cPanel.
- imapc: Don't try to add mails to index if they already exist there.
- imapc: If email is modified in istream_opened hook, mail size isn't
updated.
- lib-dcrypt: When reading encrypted data, more data would not be
read if buffer was not consumed causing panic or hang.
- notify: When notify plugin is used and transaction commit fails in
dsync, crash occurs.
- sdbox: When delivering to a mailbox that is over quota, temp files
are not cleaned up when saving or copying fails.
v2.2.34 2018-02-28 Timo Sirainen <tss@iki.fi>
* CVE-2017-15130: TLS SNI config lookups may lead to excessive
memory usage, causing imap-login/pop3-login VSZ limit to be reached
and the process restarted. This happens only if Dovecot config has
local_name { } or local { } configuration blocks and attacker uses
randomly generated SNI servernames.
* CVE-2017-14461: Parsing invalid email addresses may cause a crash or
leak memory contents to attacker. For example, these memory contents
might contain parts of an email from another user if the same imap
process is reused for multiple users. First discovered by Aleksandar
Nikolic of Cisco Talos. Independently also discovered by "flxflndy"
via HackerOne.
* CVE-2017-15132: Aborted SASL authentication leaks memory in login
process.
* Linux: Core dumping is no longer enabled by default via
PR_SET_DUMPABLE, because this may allow attackers to bypass
chroot/group restrictions. Found by cPanel Security Team. Nowadays
core dumps can be safely enabled by using "sysctl -w
fs.suid_dumpable=2". If the old behaviour is wanted, it can still be
enabled by setting:
import_environment=$import_environment PR_SET_DUMPABLE=1
* doveconf output now includes the hostname.
+ mail_attachment_detection_options setting controls when
$HasAttachment and $HasNoAttachment keywords are set for mails.
+ imap: Support fetching body snippets using FETCH (SNIPPET) or
(SNIPPET (LAZY=FUZZY))
+ fs-compress: Automatically detect whether input is compressed or not.
Prefix the compression algorithm with "maybe-" to enable the
detection, for example: "compress:maybe-gz:6:..."
+ Added settings to change dovecot.index* files' optimization behavior.
See https://wiki2.dovecot.org/IndexFiles#Settings
+ Auth cache can now utilize auth workers to do password hash
verification by setting auth_cache_verify_password_with_worker=yes.
+ Added charset_alias plugin. See
https://wiki2.dovecot.org/Plugins/CharsetAlias
+ imap_logout_format and pop3_logout_format settings now support all of
the generic variables (e.g. %{rip}, %{session}, etc.)
+ Added auth_policy_check_before_auth, auth_policy_check_after_auth
and auth_policy_report_after_auth settings.
- v2.2.33: doveadm-server: Various fixes related to log handling.
- v2.2.33: doveadm failed when trying to access UNIX socket that didn't
require authentication.
- v2.2.33: doveadm log reopen stopped working
- v2.2.30+: IMAP stopped advertising SPECIAL-USE capability
- v2.2.30+: IMAP stopped sending untagged OK/NO storage notifications
- replication: dsync sends unnecessary replication notification for
changes it does internally. NOTE: Folder creates, renames, deletes
and subscribes still trigger unnecessary replication notifications,
but these should be rather rare.
- mail_always/never_cache_fields setting changes weren't applied for
existing dovecot.index.cache files.
- Fix compiling and other problems with OpenSSL v1.1
- auth policy: With master user logins, lookup using login username.
- FTS reindexed all mails unnecessarily after loss of
dovecot.index.cache file
- mdbox rebuild repeatedly fails with "missing map extension"
- SSL connections may have been hanging with imapc or doveadm client.
- cassandra: Using protocol v3 (Cassandra v2.1) caused memory leaks and
also timestamps weren't set to queries.
- fs-crypt silently ignored public/private keys specified in
configuration (mail_crypt_global_public/private_key) and just
emitted plaintext output.
- lock_method=dotlock caused crashes
- imapc: Reconnection may cause crashes and other errors
v2.2.33.2 2017-10-20 Timo Sirainen <tss@iki.fi>
- doveadm: Fix crash in proxying (or dsync replication) if remote is
running older than v2.2.33
- auth: Fix memory leak in %{ldap_dn}
- dict-sql: Fix data types to work correctly with Cassandra
v2.2.33.1 2017-10-10 Timo Sirainen <tss@iki.fi>
- dovecot-lda was logging to stderr instead of to the log file.
v2.2.33 2017-10-10 Timo Sirainen <tss@iki.fi>
* doveadm director commands wait for the changes to be visible in the
whole ring before they return. This is especially useful in testing.
* Environments listed in import_environment setting are now set or
preserved when executing standalone commands (e.g. doveadm)
+ doveadm proxy: Support proxying logs. Previously the logs were
visible only in the backend's logs.
+ Added %{if}, see https://wiki2.dovecot.org/Variables#Conditionals
+ Added a new notify_status plugin, which can be used to update dict
with current status of a mailbox when it changes. See
https://wiki2.dovecot.org/Plugins/NotifyStatus
+ Mailbox list index can be disabled for a namespace by appending
":LISTINDEX=" to location setting.
+ dsync/imapc: Added dsync_hashed_headers setting to specify which
headers are used to match emails.
+ pop3-migration: Add pop3_migration_ignore_extra_uidls=yes to ignore
mails that are visible in POP3 but not IMAP. This could happen if
new mails were delivered during the migration run.
+ pop3-migration: Further improvements to help with Zimbra
+ pop3-migration: Cache POP3 UIDLs in imapc's dovecot.index.cache
if indexes are enabled. These are used to optimize incremental syncs.
+ cassandra, dict-sql: Use prepared statements if protocol version>3.
+ auth: Added %{ldap_dn} variable for passdb/userdb ldap
- acl: The "create" (k) permission in global acl-file was sometimes
ignored, allowing users to create mailboxes when they shouldn't have.
- sdbox: Mails were always opened when expunging, unless
mail_attachment_fs was explicitly set to empty.
- lmtp/doveadm proxy: hostip passdb field was ignored, which caused
unnecessary DNS lookups if host field wasn't an IP
- lmtp proxy: Fix crash when receiving unexpected reply in RCPT TO
- quota_clone: Update also when quota is unlimited (broken in v2.2.31)
- mbox, zlib: Fix assert-crash when accessing compressed mbox
- doveadm director kick -f parameter didn't work
- doveadm director flush <host> resulted flushing all hosts, if <host>
wasn't an IP address.
- director: Various fixes to handling backend/director changes at
abnormal times, especially while ring was unsynced. These could have
resulted in crashes, non-optimal behavior or ignoring some of the
changes.
- director: Use less CPU in imap-login processes when moving/kicking
many users.
- lmtp: Session IDs were duplicated/confusing with multiple RCPT TOs
when lmtp_rcpt_check_quota=yes
- doveadm sync -1 fails when local mailboxes exist that do not exist
remotely. This commonly happened when lazy_expunge mailbox was
autocreated when incremental sync expunged mails.
- pop3: rawlog_dir setting didn't work
v2.2.32 2017-08-24 Timo Sirainen <tss@iki.fi>
* imapc: Info-level line is logged every time when successfully
connected to the remote server. This includes local/remote IP/port,
which can be useful for matching against external logs.
* config: Log a warning if plugin { key=no } is used explicitly.
v2.3 will support "no" properly in plugin settings, but for now
any value at all for a boolean plugin setting is treated as "yes",
even if it's written as explicit "no". This change will now warn
that it most likely won't work as intended.
+ Various optimizations to avoid accessing files/directories when it's
not necessary. Especially avoid accessing mail root directories when
INDEX directories point to a different filesystem.
+ mail_location can now include ITERINDEX parameter. This tells Dovecot
to perform mailbox listing from the INDEX path instead of from the
mail root path. It's mainly useful when the INDEX storage is on a
faster storage.
+ mail_location can now include VOLATILEDIR=<path> parameter. This
is used for creating lock files and in future potentially other
files that don't need to exist permanently. The path could point to
tmpfs for example. This is especially useful to avoid creating lock
files to NFS or other remote filesystems. For example:
mail_location=sdbox:~/sdbox:VOLATILEDIR=/tmp/volatile/%2.256Nu/%u
+ mail_location's LISTINDEX=<path> can now contain a full path.
This allows storing mailbox list index to a different storage
than the rest of the indexes, for example to tmpfs.
+ mail_location can now include NO-NOSELECT parameter. This
automatically deletes any \NoSelect mailboxes that have no children.
These mailboxes are sometimes confusing to users.
+ mail_location can now include BROKENCHAR=<char> parameter. This can
be useful with imapc to access mailbox names that aren't valid mUTF-7
charset from remote servers.
+ If mailbox_list_index_very_dirty_syncs=yes, the list index is no
longer refreshed against filesystem when listing mailboxes. This
allows the mailbox listing to be done entirely by only reading the
mailbox list index.
+ Added mailbox_list_index_include_inbox setting to control whether
INBOX's STATUS information should be cached in the mailbox list
index. The default is "no", but it may be useful to change it to
"yes", especially if LISTINDEX points to tmpfs.
+ userdb can return chdir=<path>, which override mail_home for the
chdir location. This can be useful to avoid accessing home directory
on login.
+ userdb can return postlogin=<socket> to specify per-user imap/pop3
postlogin socket path.
+ cassandra: Add support for result paging by adding page_size=<n>
parameter to the connect setting.
+ dsync/imapc, pop3-migration plugin: Strip also trailing tabs from
headers when matching mails. This helps with migrations from Zimbra.
+ imap_logout_format supports now %{appended} and %{autoexpunged}
+ virtual plugin: Optimize IDLE to use mailbox list index for finding
out when something has changed.
+ Added apparmor plugin. See https://wiki2.dovecot.org/Plugins/Apparmor
- virtual plugin: A lot of fixes. In many cases it was also working
very inefficiently or even incorrectly.
- imap: NOTIFY parameter parsing was incorrectly "fixed" in v2.2.31.
It was actually (mostly) working in previous versions, but broken
in v2.2.31.
- Modseq tracking didn't always work correctly. This could have caused
imap unhibernation to fail or IMAP QRESYNC/CONDSTORE extensions to
not work perfectly.
- mdbox: "Inconsistency in map index" wasn't fixed automatically
- dict-ldap: %variable values used in the LDAP filter weren't escaped.
- quota=count: quota_warning = -storage=.. was never executed (try #2).
v2.2.31 fixed it for -messages, but not for -storage.
- imapc: >= 32 kB mail bodies were supposed to be cached for subsequent
FETCHes, but weren't.
- quota-status service didn't support recipient_delimiter
- acl: Don't access dovecot-acl-list files with acl_globals_only=yes
- mail_location: If INDEX dir is set, mailbox deletion deletes its
childrens' indexes. For example if "box" is deleted, "box/child"
index directory was deleted as well (but mails were preserved).
- director: v2.2.31 caused rapid reconnection loops to directors
that were down.
v2.2.31 2017-06-26 Timo Sirainen <tss@iki.fi>
* LMTP: Removed "(Dovecot)" from added Received headers. Some
installations want to hide it, and there's not really any good reason
for anyone to have it.
+ Add ssl_alt_cert and ssl_alt_key settings to add support for
having both RSA and ECDSA certificates.
+ dsync/imapc, pop3-migration plugin: Strip trailing whitespace from
headers when matching mails. This helps with migrations from Zimbra.
+ acl: Add acl_globals_only setting to disable looking up
per-mailbox dovecot-acl files.
+ Parse invalid message addresses better. This mainly affects the
generated IMAP ENVELOPE replies.
- v2.2.30 wasn't fixing corrupted dovecot.index.cache files properly.
It could have deleted wrong mail's cache or assert-crashed.
- v2.2.30 mail-crypt-acl plugin was assert-crashing
- v2.2.30 welcome plugin wasn't working
- Various fixes to handling mailbox listing. Especially related to
handling nonexistent autocreated/autosubscribed mailboxes and ACLs.
- Global ACL file was parsed as if it was local ACL file. This caused
some of the ACL rule interactions to not work exactly as intended.
- auth: forward_* fields didn't work properly: Only the first forward
field was working, and only if the first passdb lookup succeeded.
- Using mail_sort_max_read_count sometimes caused "Broken sort-*
indexes, resetting" errors.
- Using mail_sort_max_read_count may have caused very high CPU usage.
- Message address parsing could have crashed on invalid input.
- imapc_features=fetch-headers wasn't always working correctly and
caused the full header to be fetched.
- imapc: Various bugfixes related to connection failure handling.
- quota=imapc sent unnecessary FETCH RFC822.SIZE to server when
expunging mails.
- quota=count: quota_warning = -storage=.. was never executed
- quota=count: Add support for "ns" parameter
- dsync: Fix incremental syncing for mails that don't have Date or
Message-ID headers.
- imap: Fix hang when client sends pipelined SEARCH +
EXPUNGE/CLOSE/LOGOUT.
- oauth2: Token validation didn't accept empty server responses.
- imap: NOTIFY command has been almost completely broken since the
beginning. I guess nobody has been trying to use it.
v2.2.30.2 2017-06-06 Timo Sirainen <tss@iki.fi>
- auth: Multiple failed authentications within short time caused
crashes
- push-notification: OX driver crashed at deinit
v2.2.30.1 2017-05-31 Timo Sirainen <tss@iki.fi>
- quota_warning scripts weren't working in v2.2.30
- vpopmail still wasn't compiling
v2.2.30 2017-05-30 Timo Sirainen <tss@iki.fi>
* auth: Use timing safe comparisons for everything related to
passwords. It's unlikely that these could have been used for
practical attacks, especially because Dovecot delays and flushes all
failed authentications in 2 second intervals. Also it could have
worked only when passwords were stored in plaintext in the passdb.
* master process sends SIGQUIT to all running children at shutdown,
which instructs them to close all the socket listeners immediately.
This way restarting Dovecot should no longer fail due to some
processes keeping the listeners open for a long time.
+ auth: Add passdb { mechanisms=none } to match separate passdb lookup
+ auth: Add passdb { username_filter } to use passdb only if user
matches the filter. See https://wiki2.dovecot.org/PasswordDatabase
+ dsync: Add dsync_commit_msgs_interval setting. It attempts to commit
the transaction after saving this many new messages. Because of the
way dsync works, it may not always be possible if mails are copied
or UIDs need to change.
+ imapc: Support imapc_features=search without ESEARCH extension.
+ imapc: Add imapc_features=fetch-bodystructure to pass through remote
server's FETCH BODY and BODYSTRUCTURE.
+ imapc: Add quota=imapc backend to use GETQUOTA/GETQUOTAROOT on the
remote server.
+ passdb imap: Add allow_invalid_cert and ssl_ca_file parameters.
+ If dovecot.index.cache corruption is detected, reset only the one
corrupted mail instead of the whole file.
+ doveadm mailbox status: Add "firstsaved" field.
+ director_flush_socket: Add old host's up/down and vhost count as parameters
- More fixes to automatically fix corruption in dovecot.list.index
- dsync-server: Fix support for dsync_features=empty-header-workaround
- imapc: Various bugfixes, including infinite loops on some errors
- IMAP NOTIFY wasn't working for non-INBOX if IMAP client hadn't
enabled modseq tracking via CONDSTORE/QRESYNC.
- fts-lucene: Fix it to work again with mbox format
- Some internal error messages may have contained garbage in v2.2.29
- mail-crypt: Re-encrypt when copying/moving mails and per-mailbox keys
are used. Otherwise the copied mails can't be opened.
- vpopmail: Fix compiling
v2.2.29.1 2017-04-12 Timo Sirainen <tss@iki.fi>
- imapc reconnection fix was forgotten from 2.2.29 release, which also
made "make check" fail in a unit test
- dict-sql: Merging multiple UPDATEs to a single statement wasn't
actually working.
- Fixed building with vpopmail
v2.2.29 2017-04-10 Timo Sirainen <tss@iki.fi>
* passdb/userdb dict: Don't double-expand %variables in keys. If dict
was used as the authentication passdb, using specially crafted
%variables in the username could be used to cause DoS (CVE-2017-2669)
* When Dovecot encounters an internal error, it logs the real error and
usually logs another line saying what function failed. Previously the
second log line's error message was a rather uninformative "Internal
error occurred. Refer to server log for more information." Now the
real error message is duplicated in this second log line.
* lmtp: If a delivery has multiple recipients, run autoexpunging only
for the last recipient. This avoids a problem where a long
autoexpunge run causes LMTP client to timeout between the DATA
replies, resulting in duplicate mail deliveries.
* config: Don't stop the process due to idling. Otherwise the
configuration is reloaded when the process restarts.
* mail_log plugin: Differentiate autoexpunges from regular expunges
* imapc: Use LOGOUT to cleanly disconnect from server.
* lib-http: Internal status codes (>9000) are no longer visible in logs
* director: Log vhost count changes and HOST-UP/DOWN
+ quota: Add plugin { quota_max_mail_size } setting to limit the
maximum individual mail size that can be saved.
+ imapc: Add imapc_features=delay-login. If set, connecting to the
remote IMAP server isn't done until it's necessary.
+ imapc: Add imapc_connection_retry_count and
imapc_connection_retry_interval settings.
+ imap, pop3, indexer-worker: Add (deinit) to process title before
autoexpunging runs.
+ Added %{encrypt} and %{decrypt} variables
+ imap/pop3 proxy: Log proxy state in errors as human-readable string.
+ imap/pop3-login: All forward_* extra fields returned by passdb are
sent to the next hop when proxying using ID/XCLIENT commands. On the
receiving side these fields are imported and sent to auth process
where they're accessible via %{passdb:forward_*}. This is done only
if the sending IP address matches login_trusted_networks.
+ imap-login: If imap_id_retain=yes, send the IMAP ID string to
auth process. %{client_id} expands to it in auth process. The ID
string is also sent to the next hop when proxying.
+ passdb imap: Use ssl_client_ca_* settings for CA validation.
- fts-tika: Fixed crash when parsing attachment without
Content-Disposition header. Broken by 2.2.28.
- trash plugin was broken in 2.2.28
- auth: When passdb/userdb lookups were done via auth-workers, too much
data was added to auth cache. This could have resulted in wrong
replies when using multiple passdbs/userdbs.
- auth: passdb { skip & mechanisms } were ignored for the first passdb
- oauth2: Various fixes, including fixes to crashes
- dsync: Large Sieve scripts (or other large metadata) weren't always
synced.
- Index rebuild (e.g. doveadm force-resync) set all mails as \Recent
- imap-hibernate: %{userdb:*} wasn't expanded in mail_log_prefix
- doveadm: Exit codes weren't preserved when proxying commands via
doveadm-server. Almost all errors used exit code 75 (tempfail).
- ACLs weren't applied to not-yet-existing autocreated mailboxes.
- Fixed a potential crash when parsing a broken message header.
- cassandra: Fallback consistency settings weren't working correctly.
- doveadm director status <user>: "Initial config" was always empty
- imapc: Various reconnection fixes.
v2.2.28 2017-02-24 Timo Sirainen <tss@iki.fi>
* director: "doveadm director move" to same host now refreshes user's
timeout. This allows keeping user constantly in the same backend by
just periodically moving the user there.
* When new mailbox is created, use initially INBOX's
dovecot.index.cache caching decisions.
* Expunging mails writes GUID to dovecot.index.log now only if the
GUID is quickly available from index/cache.
* pop3c: Increase timeout for PASS command to 5 minutes.
* Mail access errors are no longer ignored when searching or sorting.
With IMAP the untagged SEARCH/SORT reply is still sent the same as
before, but NO reply is returned instead of OK.
+ Make dovecot.list.index's filename configurable. This is needed when
there are multiple namespaces pointing to the same mail root
(e.g. lazy_expunge namespace for mdbox).
+ Add size.virtual to dovecot.index when folder vsizes are accessed
(e.g. quota=count). This is mainly a workaround to avoid slow quota
recalculation performance when message sizes get lost from
dovecot.index.cache due to corruption or some other reason.
+ auth: Support OAUTHBEARER and XOAUTH2 mechanisms. Also support them
in lib-dsasl for client side.
+ auth: Support filtering by SASL mechanism: passdb { mechanisms }
+ Shrink the mail processes' memory usage by not storing settings
duplicated unnecessarily many times.
+ imap: Add imap_fetch_failure setting to control what happens when
FETCH fails for some mails (see example-config).
+ imap: Include info about last command in disconnection log line.
+ imap: Created new SEARCH=X-MIMEPART extension. It's currently not
advertised by default, since it's not fully implemented.
+ fts-solr: Add support for basic authentication.
+ Cassandra: Support automatically retrying failed queries if
execution_retry_interval and execution_retry_times are set.
+ doveadm: Added "mailbox path" command.
+ mail_log plugin: If plugin { mail_log_cached_only=yes }, log the