Tuesday 22nd June 2021
Fedora Project
Updated proftpd (1.3.7b) in Rawhide to add glibc-gconv-extra as a test requirement from Fedora 35 onwards due to Changes/Gconv_package_split_in_glibc
Local Packages
Updated dovecot (2.3):
Updated dovecot to 2.3.15:
CVE-2021-29157: Dovecot does not correctly escape kid and azp fields in JWT tokens, which may be used to supply attacker controlled keys to validate tokens, if attacker has local access
CVE-2021-33515: On-path attacker could have injected plaintext commands before STARTTLS negotiation that would be executed after STARTTLS finished with the client
- Disconnection log messages are now more standardized across services; they also always now start with "Disconnected" prefix
Dovecot now depends on libsystemd for systemd integration
- Removed support for Lua 5.2; use version 5.1 or 5.3 instead
config: Some settings are now marked as "hidden" and it's discouraged to change these settings; they will no longer be visible in doveconf output, except if they have been changed or if the doveconf -s parameter is used (see https://doc.dovecot.org/settings/advanced/ for details)
imap-compress: Compression level is now algorithm specific (see https://doc.dovecot.org/settings/plugin/compress-plugin/)
indexer-worker: Convert "Indexed" info logs to an event named "indexer_worker_indexing_finished" (see https://doc.dovecot.org/admin_manual/list_of_events/#indexer-worker-indexing-finished)
Add TSLv1.3 support to min_protocols
Allow configuring ssl_cipher_suites (for TLSv1.3+)
acl: Add acl_ignore_namespace setting, which allows to entirely ignore ACLs for the listed namespaces
imap: Support official RFC8970 preview/snippet syntax; old methods of retrieving preview information via IMAP commands ("SNIPPET and PREVIEW with explicit algorithm selection") have been deprecated
imapc: Support INDEXPVT for imapc storage to enable private message flags for cluster wide shared mailboxes
lib-storage: Add new events: mail_opened, mail_expunge_requested, mail_expunged, mail_cache_lookup_finished (see https://doc.dovecot.org/admin_manual/list_of_events/#mail)
zlib, imap-compression, fs-compress: Support compression levels that the algorithm supports
- Before, we would allow hardcoded value between 1 and 9 and would default to 6
- Now, we allow using per-algorithm value range and default to whatever default the algorithm specifies
*-login: Commands pipelined together with and just after the authenticate command cause these commands to be executed twice; this applies to all protocols that involve user login, which currently comprises of imap, pop3, submission and managesieve
*-login: Processes are supposed to disconnect the oldest non-logged in connection when process_limit was reached; this didn't actually happen with the default "high-security mode" (with service_count=1) where each connection is handled by a separate process
*-login: When login process reaches client/process limits, oldest client connections are disconnected; if one of these was still doing anvil lookup, this caused a crash, though it could happen only if the login process limits were very low or if the server was overloaded
Fixed building with link time optimizations (-flto)
auth: Userdb iteration with passwd driver does not always return all users with some nss drivers
dsync: Shared INBOX not synced when "mail_shared_explicit_inbox" was disabled; if a user has a shared mailbox which is another user's INBOX, dsync didn't include the mailbox in syncing unless explicit naming was enabled with "mail_shared_explicit_inbox" set to "yes"
dsync: Shared namespaces were not synced with "-n" flag
dsync: Syncing shared INBOX failed if mail_attribute_dict was not set; if a user has a shared mailbox that is another user's INBOX, dsync failed to export the mailbox if mail attributes are disabled
fts-solr, fts-tika: Using both Solr FTS and Tika may have caused HTTP requests to assert-crash: Panic: file http-client-request.c: line 1232 (http_client_request_send_more): assertion failed: (req->payload_input != NULL)
fts-tika: 5xx errors returned by Tika server as indexing failures; however, Tika can return 5xx for some attachments every time, so the 5xx error should be retried once, but treated as success if it happens on the retry as well (v2.3 regression)
fts-tika: v2.3.11 regression: Indexing messages with fts-tika may have resulted in Panic: file message-parser.c: line 802 (message_parser_deinit_from_parts): assertion failed: (ctx->nested_parts_count == 0 || i_stream_have_bytes_left(ctx->input))
imap: SETMETADATA could not be used to unset metadata values; instead, NIL was handled as a "NIL" string (v2.3.14 regression)
imap: IMAP BINARY FETCH crashes at least on empty base64 body: Panic: file index-mail-binary.c: line 358 (blocks_count_lines): assertion failed: (block_count == 0 || block_idx+1 == block_count)
imap: If IMAP client using the NOTIFY command was disconnected while sending FETCH notifications to the client, imap could crash with Panic: Trying to close mailbox INBOX with open transactions
imap: Using IMAP COMPRESS extension can cause IMAP connection to hang when IMAP commands are >8 kB long
imapc: If remote server sent BYE but didn't immediately disconnect, it could cause infinite busy-loop
lib-index: Corrupted cache record size in dovecot.index.cache file could have caused a crash (segfault) when accessing it
lib-oauth2: JWT token time validation now works correctly with 32-bit systems
lib-ssl-iostream: Checking hostnames against an SSL certificate was case-sensitive
lib-storage: Corrupted mime.parts in dovecot.index.cache may have resulted in Panic: file imap-bodystructure.c: line 206 (part_write_body): assertion failed: (text == ((part->flags & MESSAGE_PART_FLAG_TEXT) != 0))
lib-storage: Index rebuilding (e.g. via doveadm force-resync) didn't preserve the "hdr-pop3-uidl" header; because of this, the next pop3 session could have accessed all of the emails' metadata to read their POP3 UIDL (opening dbox files)
listescape: When using the listescape plugin and a shared namespace, the plugin didn't work properly anymore, resulting in errors like: "Invalid mailbox name: Name must not have '/' character"
lmtp: Connection crashes if connection gets disconnected due to multiple bad commands and the last bad command is BDAT
lmtp: The Dovecot-specific LMTP parameter XRCPTFORWARD was blindly forwarded by LMTP proxy without checking that the backend has support; this caused a command parameter error from the backend if it was running an older Dovecot release (this could only occur in more complex setups where the message was proxied twice; when the proxy generated the XRCPTFORWARD parameter itself the problem did not occur, so this only happened when it was forwarded)
lmtp: The LMTP proxy crashes with a panic when the remote server replies with an error while the mail is still being forwarded through a DATA/BDAT command
lmtp: Username may have been missing from lmtp log line prefixes when it was performing autoexpunging
master: Dovecot would incorrectly fail with haproxy 2.0.14 service checks
master: systemd service: Dovecot announces readiness for accepting connections earlier than it should; the following environment variables are now imported automatically and can be omitted from import_environment setting: NOTIFY_SOCKET LISTEN_FDS LISTEN_PID
master: service { process_min_avail } was launching processes too slowly when master was forking a lot of processes
util: Make the health-check.sh example script POSIX shell compatible
Updated pigeonhole to 0.5.15:
CVE-2020-28200: Sieve interpreter is not protected against abusive scripts that claim excessive resource usage: fixed by limiting the user CPU time per single script execution and cumulatively over several script runs within a configurable timeout period; sufficiently large CPU time usage is summed in the Sieve script binary and execution is blocked when the sum exceeds the limit within that time, and the block is lifted when the script is updated after the resource usage times out
- Disconnection log messages are now more standardized across services; they also always now start with "Disconnected" prefix
managesieve: Commands pipelined together with and just after the authenticate command cause these commands to be executed twice
Updated proftpd (1.3.7b) as per the Fedora version