Debian: DSA-4761-1: zeromq3 security update

It was discovered that ZeroMQ, a lightweight messaging kernel library does not properly handle connecting peers before a handshake is completed. A remote, unauthenticated client connecting to an application using the libzmq library, running with a socket listening with CURVE

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Debian Security Advisory DSA-4761-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                     Salvatore Bonaccorso
September 07, 2020                    https://www.debian.org/security/faq
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Package        : zeromq3
CVE ID         : CVE-2020-15166

It was discovered that ZeroMQ, a lightweight messaging kernel library
does not properly handle connecting peers before a handshake is
completed. A remote, unauthenticated client connecting to an application
using the libzmq library, running with a socket listening with CURVE
encryption/authentication enabled can take advantage of this flaw to
cause a denial of service affecting authenticated and encrypted clients.

For the stable distribution (buster), this problem has been fixed in
version 4.3.1-4+deb10u2.

We recommend that you upgrade your zeromq3 packages.

For the detailed security status of zeromq3 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/zeromq3

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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