A zeromq security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: zeromq-4.3.4-1.fc33

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Fedora Update Notification
FEDORA-2021-8b3202b783
2021-02-08 01:29:15.824785
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Name : zeromq
Product : Fedora 33
Version : 4.3.4
Release : 1.fc33
URL :   https://zeromq.org
Summary : Software library for fast, message-based applications
Description :
The 0MQ lightweight messaging kernel is a library which extends the
standard socket interfaces with features traditionally provided by
specialized messaging middle-ware products. 0MQ sockets provide an
abstraction of asynchronous message queues, multiple messaging
patterns, message filtering (subscriptions), seamless access to
multiple transport protocols and more.

This package contains the ZeroMQ shared library.

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Update Information:

- Upstream upgrade - Fixes #1921879, #1921972, #1921973, #1921975, #1921976,
#1921979, #1921981, #1921983, #1921983, #1921985, #1921987, #1921989, #1921992,
#1921994
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ChangeLog:

* Sat Jan 30 2021 Denis Arnaud - 4.3.4-1
- Upstream upgrade
- Fixes #1921879, #1921972, #1921973, #1921975, #1921976, #1921979, #1921981,
- #1921983, #1921983, #1921985, #1921987, #1921989, #1921992, #1921994
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References:

[ 1 ] Bug #1921972 - zeromq: Memory leak in client induced by malicious server without CURVE/ZAP
  https://bugzilla.redhat.com/show_bug.cgi?id=1921972
[ 2 ] Bug #1921976 - zeromq: Stack overflow on server running PUB/XPUB socket
  https://bugzilla.redhat.com/show_bug.cgi?id=1921976
[ 3 ] Bug #1921983 - zeromq: Heap overflow when receiving malformed ZMTP v1 packets
  https://bugzilla.redhat.com/show_bug.cgi?id=1921983
[ 4 ] Bug #1921989 - zeromq: Memory leaks via metadata messages processed by PUB sockets
  https://bugzilla.redhat.com/show_bug.cgi?id=1921989
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-8b3202b783' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys