Log Message:
zeromq: updated to 4.3.4

libzmq 4.3.4

New DRAFT (see NEWS for 4.2.0) socket option:

ZMQ_PRIORITY will set the SO_PRIORITY socket option on the underlying
sockets. Only supported on Linux.
See doc/zmq_setsockopt.txt and doc/zmq_getsockopt.txt for details.
Fixed 4113 - compilation errors on kFreeBSD and GNU/Hurd

Fixed 4086 - excessive amount of socket files left behind in Windows TMP
directory

Fixed 4108 - regression that breaks using IPv6 link-local addresses on Linux

Fixed 4078 - compilation errors on Android

Fixed 4074 - compilation error with ulibc and libbsd

Fixed 4060 - stack overflow on Windows x64

Fixed 4051 - various compilation errors on Windows ARM 32bit

Fixed 4043 - various compilation warnings with XCode

Fixed 4038 - return value of zmq_ctx_get changed unintentionally

libzmq 4.3.3

Security advisories:

CVE-2020-15166: Denial-of-Service on CURVE/ZAP-protected servers by
unauthenticated clients.
If a raw TCP socket is opened and connected to an endpoint that is fully
configured with CURVE/ZAP, legitimate clients will not be able to exchange
any message. Handshakes complete successfully, and messages are delivered to
the library, but the server application never receives them.
For more information see the security advisory:
GHSA-25wp-cf8g-938m
Stack overflow on server running PUB/XPUB socket (CURVE disabled).
The PUB/XPUB subscription store (mtrie) is traversed using recursive
function calls. In the remove (unsubscription) case, the recursive calls are
NOT tail calls, so even with optimizations the stack grows linearly with the
length of a subscription topic. Topics are under the control of remote
clients - they can send a subscription to arbitrary length topics. An
attacker can thus cause a server to create an mtrie sufficiently large such
that, when unsubscribing, traversal will cause a stack overflow.
For more information see the security advisory:
GHSA-qq65-x72m-9wr8
Memory leak in PUB server induced by malicious client(s) without CURVE/ZAP.
Messages with metadata are never processed by PUB sockets, but the metadata
is kept referenced in the PUB object and never freed.
For more information see the security advisory:
GHSA-4p5v-h92w-6wxw
Memory leak in client induced by malicious server(s) without CURVE/ZAP.
When a pipe processes a delimiter and is already not in active state but
still has an unfinished message, the message is leaked.
For more information see the security advisory:
GHSA-wfr2-29gj-5w87
Heap overflow when receiving malformed ZMTP v1 packets (CURVE disabled).
By crafting a packet which is not valid ZMTP v2/v3, and which has two
messages larger than 8192 bytes, the decoder can be tricked into changing
the recorded size of the 8192 bytes static buffer, which then gets overflown
by the next message. The content that gets written in the overflown memory
is entirely decided by the sender.
For more information see the security advisory:
GHSA-fc3w-qxf5-7hp6
Note for packagers: an external, self-contained sha1 library is now
included in the source tree under external/sha1/ - it is licensed
under BSD-3-Clause and thus it is fully compatible with libzmq's
license.
It is only used if WebSockets support is enabled, and if neither GnuTLS nor
NSS are available.

Note for packagers: an internal reimplementation of strlcpy is now included,
for wider platform compatibility.
libbsd can be used and is enabled by default if available instead of the
internal implementation, for better security maintenance in distros.

Note for packagers: ZeroMQConfig.cmake is now installed in the arch-dependent
subdirectory - eg: /usr/lib/x86_64-linux-gnu/cmake/

New DRAFT (see NEWS for 4.2.0) socket type:

ZMQ_CHANNEL is a thread-safe alternative to ZMQ_PAIR.
See doc/zmq_socket.txt for details.
New DRAFT (see NEWS for 4.2.0) socket option:

ZMQ_ONLY_FIRST_SUBSCRIBE will cause only the first part of a multipart
message to be processed as a subscribe/unsubscribe message, and the rest
will be forwarded as user data to the application.
ZMQ_RECONNECT_STOP will cause a connecting socket to stop trying to
reconnect in specific circumstances. See the manpage for details.
ZMQ_HELLO_MSG to set a message that will be automatically sent to a new
connection.
ZMQ_DISCONNECT_MSG to set a message that will be automatically received when
a peer disconnects.
See doc/zmq_setsockopt.txt and doc/zmq_getsockopt.txt for details.
New DRAFT (see NEWS for 4.2.0) zmq_ctx_get_ext/zmq_ctx_set_ext APIs were added
to allow enhancing the context options with variable data inputs.
See doc/zmq_ctx_get_ext.txt and doc/zmq_ctx_set_ext.txt for details.

New DRAFT (see NEWS for 4.2.0) transport options WS and WSS added for support
of WebSockets (and secure WebSockets via TLS) via the ZWS 2.0 protocol.
WSS requires the GnuTLS library for TLS support. ZMQ_WSS_ specific socket
options were added to support TLS.
WebSockets support is disabled by default if DRAFT APIs are disabled.

New DRAFT (see NEWS for 4.2.0) socket type, PEER, which is thread safe and a
related zmq_connect_peer function which atomically and thread-safely connects
and returns a routing-id.

New DRAFT (see NEWS for 4.2.0) zmq_msg_init_buffer API was added to allow
the construction of a message by copying from an existing buffer.

New DRAFT (see NEWS for 4.2.0) zmq_poller_size API was added to allow querying
the number of sockets/fds registered in a zmq_poller.

ZMTP 3.1 peers will receive subscribe/cancel on PUB/SUB via commands rather
than using the first byte of the payload.

zmq_z85_decode now checks that the input string's length is at least 5 characters
and always a multiple of 5 as per API specification.

Fixed 3566 - malformed CURVE message can cause memory leak

Fixed 3567 - missing ZeroMQ_INCLUDE_DIR in ZeroMQConfig.cmake when only
static lib is built

Fixed 3576 - CURVE plaintext secrets now stored in libsodium's secure memory

Fixed 3588 - install debug libraries for debug msvc builds with CMake

Fixed 3591 - incorrect ZMQ_MAX_SOCKETS default value in doc

Fixed 3594 - fixed stream_engine use after free due to concurrent heartbeats

Fixed 3586 - error when compiling with MinGW due to usage of MS-specific
__except keyword

Fixed 3603 - fixed CMake build on SL6.9

Fixed 3607 - added scripts to ease performance graph generation

Fixed 3608 - fix for IPv4 mapping not supported in DragonFlyBSD

Fixed 3636 - added ENABLE_PRECOMPILED CMake option to fix build with Ninja

Fixed 2862 - UDP engine aborts on networking-related errors from socket
syscalls

Fixed 3656 - segfault on sending data from XSUB to XPUB

Fixed 3646 - static-only test run fails

Fixed 3668 - fixed CMAKE_CXX_FLAGS_* regexes on MSVC

Fixed 110 - do not include winsock2.h in public zmq.h header

Fixed 3683 - allow "configure --disable-maintainer-mode"

Fixed 3686 - fix documentation about sockets blocking on send operations

Fixed 3323 - fix behavior of ZMQ_CONFLATE on PUB sockets

Fixed 3698 - fix build on IBM i/PASE/os400

Fixed 3705 - zero-sized messages cause assertion when glibc assertion are on

Fixed 3713 - remove dependency on math library by avoiding std::ceil

Fixed 3694 - build targeting Windows XP is broken

Fixed 3691 - added support for IPC on Windows 10 via AF_UNIX

Fixed 3725 - disable by default test that requires sudo on CMake

Fixed 3727 - fix zmq_poller documentation example

Fixed 3729 - do not check for FD_OOB when using WSAEventSelect on Windows

Fixed 3738 - allow renaming the library in CMake

Fixed 1808 - use AF_UNIX instead of TCP for the internal socket on Windows 10

Fixed 3758 - fix pthread_set_affinity detection in CMake

Fixed 3769 - fix undefined behaviour in array.hpp

Fixed 3772 - fix compiling under msys2-mingw

Fixed 3775 - add -latomic to the private libs flag in pkg-config if needed

Fixed 3778 - fix documentation of zmq_poller's thread safety

Fixed 3792 - do not allow creation of new sockets after zmq_ctx_shutdown

Fixed 3805 - improve performance of CURVE by reducing copies

Fixed 3814 - send subscribe/cancel as commands to ZMTP 3.1 peers

Fixed 3847 - fix building without PGM and NORM

Fixed 3849 - install .cmake file in arch-dependent subdirectory

Fixed 4005 - allow building on Windows ARM/ARM64