The Asterisk Development Team would like to announce the first
release candidate of Asterisk 13.20.0.
This release candidate is available for immediate download at

The release of Asterisk 13.20.0-rc1 resolves several issues reported by the
community and would have not been possible without your participation.

Thank you!

The following issues are resolved in this release candidate:

Security bugs fixed in this release:
 * ASTERISK-27583 - Segmentation fault occurs in asterisk with
      an invalid SDP fmtp attribute
      (Reported by Sandro Gauci)
 * ASTERISK-27582 - Segmentation fault occurs in Asterisk with
      an invalid SDP media format description
      (Reported by
      Sandro Gauci)
 * ASTERISK-27618 - Crash occurs when sending a repeated number
      of INVITE messages over TCP or TLS transport
      (Reported by
      Sandro Gauci)
 * ASTERISK-27640 - SUBSCRIBE message with a large Accept value
      causes stack corruption
      (Reported by Sandro Gauci)

New Features made in this release:
 * ASTERISK-27117 - core: Add support for timelen parsing to
      ast_parse_arg and ACO.
      (Reported by Corey Farrell)

Bugs fixed in this release:
 * ASTERISK-24386 - Asterisk "doc/lang/language-criteria.txt"
      needs update or removal.
      (Reported by Rusty Newton)
 * ASTERISK-27689 - [patch] rtp_engine: Load format name / mime
      type in uppercase again.
      (Reported by Alexander Traud)
 * ASTERISK-27679 - res_pjsip: Endpoint destruction does not
      free DTLS configuration
      (Reported by Mak Dee)
 * ASTERISK-27684 - [patch] install_prereq: Update OpenBSD
      (Reported by Alexander Traud)
 * ASTERISK-27681 - [patch] BuildSystem: Enable IMAP storage on
      (Reported by Alexander Traud)
 * ASTERISK-27680 - [patch] res_calendar: Specialized calendars
      depend on symbols of general calendar.
      (Reported by
      Alexander Traud)
 * ASTERISK-27677 - [patch] BuildSystem: Enable system provided
      libedit on OpenBSD.
      (Reported by Alexander Traud)
 * ASTERISK-27670 - [patch] BuildSystem: Remove chan_h323
      (Reported by Alexander Traud)
 * ASTERISK-27595 - [patch] BuildSystem: Invoke ldconfig with
      previous paths.
      (Reported by Alexander Traud)
 * ASTERISK-27631 - [patch] BuildSystem: Do not warn when bash
      is not installed.
      (Reported by Alexander Traud)
 * ASTERISK-27666 - chan_sip: Crash processing CANCEL request
      (Reported by Leandro Dardini)
 * ASTERISK-27584 - Internal pjproject build doesn't disable
      (Reported by Stuart Henderson)
 * ASTERISK-27669 - [patch] codecs: Add support for WebRTC iLBC
      (Reported by Alexander Traud)
 * ASTERISK-27642 - [patch] backtrace: Avoid
      (Reported by Alexander Traud)
 * ASTERISK-27555 - [patch] install_prereq: Update Debian/Ubuntu
      (Reported by Alexander Traud)
 * ASTERISK-27656 - CDR: Leaking channel snapshots allocated by
      (Reported by Kristijan Vrban)
 * ASTERISK-27426 - chan_console: cannot read and write at the
      same time with alsa backend
      (Reported by Tzafrir Cohen)
 * ASTERISK-27621 - (null) string tailing after AsyncAGIEnd AMI
      (Reported by sungtae kim)
 * ASTERISK-27652 - Null pointer Crash in PJSIP MWI
      (Reported by Joshua Elson)
 * ASTERISK-27612 - Subscriptions Persist After Expiration and
      TCP/TLS Disconnect
      (Reported by Ross Beer)
 * ASTERISK-27571 - res_pjsip: If SIP response is received
      during shutdown a crash may occur
      (Reported by Joshua
 * ASTERISK-27637 - [patch] BuildSystem: Enable autotools in
      (Reported by Alexander Traud)
 * ASTERISK-27635 - [patch] app_voicemail: Avoid always true
      warnings with clang.
      (Reported by Alexander Traud)
 * ASTERISK-27599 - [patch] install_prereq: Update
      RHEL/CentOS/Fedora libraries.
      (Reported by Alexander
 * ASTERISK-26563 - core: macOS devmode build fails: variable
      'freeswap' set but not used
      (Reported by David M. Lee)
 * ASTERISK-27630 - [patch] editline: Avoid shifting a negative
      signed value.
      (Reported by Alexander Traud)
 * ASTERISK-16172 - Problems with siren14 codec; problems with
      siren7 sound files.
      (Reported by Steve Murphy)
 * ASTERISK-16951 - [patch] in 1.4.37 broken with
      autoconf 2.60
      (Reported by Stéphan Kochen)
 * ASTERISK-27603 - [patch] install_prereq: Download latest
      (Reported by Alexander Traud)
 * ASTERISK-27607 - [patch] res_config_mysql: Avoid the header
      (Reported by Alexander Traud)
 * ASTERISK-24598 - When running
      ./contrib/scripts/install_prereq install-unpackaged pjproject is
      installed in wrong place
      (Reported by PowerPBX)
 * ASTERISK-27602 - [patch] BuildSystem: AC_CONFIG_AUX_DIR needs
      a directory.
      (Reported by Alexander Traud)
 * ASTERISK-27600 - [patch] BuildSystem: Allow make clean all
      (Reported by Alexander Traud)
 * ASTERISK-27598 - [patch] install_prereq: Support package
      manager DNF.
      (Reported by Alexander Traud)
 * ASTERISK-26596 - Placing call on hold temporarily locks up
      (Reported by Igor Goncharovsky)
 * ASTERISK-27596 - [patch] BuildSystem: Use the detected name
      for MD5 everywhere.
      (Reported by Alexander Traud)
 * ASTERISK-27594 - [patch] BuildSystem: Invoke install not in
      GNU but POSIX style.
      (Reported by Alexander Traud)
 * ASTERISK-27593 - [patch] BuildSystem: In OpenBSD, xmlstarlet
      is xml.
      (Reported by Alexander Traud)
 * ASTERISK-27592 - [patch] BuildSystem: Detect external library
      Lua in version 5.3.
      (Reported by Alexander Traud)
 * ASTERISK-26832 - res_pjsip: Segfault when calling
      pjsip_hdr_print_on in sip_msg.c:581
      (Reported by Ross
 * ASTERISK-27589 - [patch] BuildSystem: Avoid $EUID and use id
      -u instead.
      (Reported by Alexander Traud)
 * ASTERISK-27575 - menuselect : remove obsolete TRACE_FRAMES
      compiler flag
      (Reported by Jean Aunis - Prescom)
 * ASTERISK-27576 - [patch] res_config_pgsql: Avoid typecasting
      an int to unsigned char.
      (Reported by Alexander Traud)
 * ASTERISK-27560 - [patch] clang 5 does not know
      (Reported by Alexander Traud)
 * ASTERISK-27578 - [patch] app_osplookup.c: Avoid a format
      (Reported by Alexander Traud)
 * ASTERISK-27577 - [patch] chan_ooh323: Avoid typecasting an
      int to unsigned short.
      (Reported by Alexander Traud)
 * ASTERISK-27491 - res_pjsip_endpoint_identifier_ip only
      matches against header if match by ip fails
      (Reported by
      George Joseph)
 * ASTERISK-27549 - [patch] translate: Avoid absolute value on
      unsigned substraction.
      (Reported by Alexander Traud)
 * ASTERISK-27553 - [patch] res_curl: Avoid error message on
      (Reported by Alexander Traud)
 * ASTERISK-27557 - [patch] clang 5.0: implicit conversion to
      char changes value to negative.
      (Reported by Alexander
 * ASTERISK-27559 - [patch] editline: Avoid comparison between
      pointer and zero character constant.
      (Reported by
      Alexander Traud)
 * ASTERISK-27558 - [patch] codec_gsm: Avoid shifting a negative
      signed value.
      (Reported by Alexander Traud)
 * ASTERISK-25329 - Asterisk configure fails on 'cannot find
      ptlib-config', despite ptlib-config existing
      (Reported by
      Rusty Newton)
 * ASTERISK-27552 - [patch] chan_ooh323: Limit outgoinglimit to
      positive values as intended.
      (Reported by Alexander Traud)
 * ASTERISK-27551 - [patch] ooh323cDriver: Fix typo in header
      (Reported by Alexander Traud)
 * ASTERISK-26046 - [patch] Avoid obsolete warnings on
      (Reported by Alexander Traud)
 * ASTERISK-27539 - 'cdr submit' fails: batch mode not enabled.

      (Reported by Tzafrir Cohen)
 * ASTERISK-27498 - ICE candidate parser - ICE foundation
      parsing too short
      (Reported by Michele Prà)
 * ASTERISK-27366 - Asterisk Turkish Language Set Problem
      (Reported by Halil Ä°brahim YILDIZ)
 * ASTERISK-23133 - Documentation fix - MASTER_CHANNEL
      Unexpected Behaviour
      (Reported by Shane Mitchell)
 * ASTERISK-27531 - Compiler optimizations can break module load
      (Reported by abelbeck)
 * ASTERISK-27480 - Security: Authenticated SUBSCRIBE without
      Contact crashes asterisk
      (Reported by Ross Beer)
 * ASTERISK-24198 - Typo's
      (Reported by Walter Doekes)
 * ASTERISK-27229 - bridge: Old channel video source not set to
      NULL after unref
      (Reported by Richard Kenner)

Improvements made in this release:
 * ASTERISK-27683 - [patch] BuildSystem: Allow newer autotools
      on OpenBSD.
      (Reported by Alexander Traud)
 * ASTERISK-27651 - app_confbridge: Add Muted to ConfbridgeJoin
      and channel snapshot headers to ConfbridgeList AMI events
      (Reported by Richard Mudgett)
 * ASTERISK-27647 - app_confbridge/bridge_softmix: When channel
      muted report talking stopped if was talking.
      (Reported by
      Richard Mudgett)
 * ASTERISK-27084 - Reduce verbosity while loading PBX
      (Reported by Ludovic Gasc (Eyepea))
 * ASTERISK-24372 - [patch] Add config option to play a prompt
      to the "winner" in app_followme
      (Reported by Graham
 * ASTERISK-27461 - 3PCC patch for AMI "SIPnotify"
      (Reported by Yasuhiko Kamata)
 * ASTERISK-27348 - [patch]contrib/scripts: add a way to migrate
      from chan_sip to chan_pjsip realtime
      (Reported by Torrey

For a full list of changes in this release candidate, please see the ChangeLog:

Thank you for your continued support of Asterisk!
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