A zeromq security update has been released for Arch Linux.

ASA-202009-16: zeromq: denial of service

Arch Linux Security Advisory ASA-202009-16
=========================================
Severity: High
Date : 2020-09-26
CVE-ID : CVE-2020-15166
Package : zeromq
Type : denial of service
Remote : Yes
Link :   https://security.archlinux.org/AVG-1219

Summary
======
The package zeromq before version 4.3.3-1 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 4.3.3-1.

# pacman -Syu "zeromq>=4.3.3-1"

The problem has been fixed upstream in version 4.3.3.

Workaround
=========
None.

Description
==========
A denial of service has been found in libzmq before 4.3.3, allowing
unauthenticated clients to prevent legitimate clients from exchange any
message with a CURVE/ZAP-protected server.

Impact
=====
A remote attacker might be able to cause a denial of service through a
malicious connection.

References
=========
  https://github.com/zeromq/libzmq/security/advisories/GHSA-25wp-cf8g-938m
  https://github.com/zeromq/libzmq/pull/3913/commits/e7f0090b161ce6344f6bd35009816a925c070b09
  https://oss-fuzz.com/testcase-detail/5707174518194176
  https://security.archlinux.org/CVE-2020-15166