1. Ubuntu Security Notices
  2. USN-4920-1

USN-4920-1: ZeroMQ vulnerabilities

Publication date

15 June 2022

Overview

Several security issues were fixed in ZeroMQ.

Releases

Packages

  • zeromq3 - lightweight messaging kernel

Details

It was discovered that ZeroMQ incorrectly handled certain application
metadata. A remote attacker could use this issue to cause ZeroMQ to crash,
or possibly execute arbitrary code. (CVE-2019-13132)

It was discovered that ZeroMQ mishandled certain network traffic. An
unauthenticated attacker could use this vulnerability to cause a denial-of-
service and prevent legitimate clients from communicating with ZeroMQ.
(CVE-2020-15166)

It was discovered that ZeroMQ did not properly manage memory under certain
circumstances. If a user or automated system were tricked into connecting
to one or multiple compromised servers, a remote attacker could use this
issue to cause a denial of service. (CVE-2021-20234)

It was discovered that ZeroMQ incorrectly handled memory when processing
messages with arbitrarily large sizes...

It was discovered that ZeroMQ incorrectly handled certain application
metadata. A remote attacker could use this issue to cause ZeroMQ to crash,
or possibly execute arbitrary code. (CVE-2019-13132)

It was discovered that ZeroMQ mishandled certain network traffic. An
unauthenticated attacker could use this vulnerability to cause a denial-of-
service and prevent legitimate clients from communicating with ZeroMQ.
(CVE-2020-15166)

It was discovered that ZeroMQ did not properly manage memory under certain
circumstances. If a user or automated system were tricked into connecting
to one or multiple compromised servers, a remote attacker could use this
issue to cause a denial of service. (CVE-2021-20234)

It was discovered that ZeroMQ incorrectly handled memory when processing
messages with arbitrarily large sizes under certain circumstances. A remote
unauthenticated attacker could use this issue to cause a ZeroMQ server to crash,
resulting in a denial of service, or possibly execute arbitrary code. This issue
only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-20235)

It was discovered that ZeroMQ did not properly manage memory under certain
circumstances. A remote unauthenticated attacker could use this issue to
cause a ZeroMQ server to crash, resulting in a denial of service. This issue
only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-20237)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.04 focal libzmq5 –  4.3.2-2ubuntu1.20.04.1~esm2  
18.04 bionic libzmq5 –  4.2.5-1ubuntu0.2+esm2  
16.04 xenial libzmq5 –  4.1.4-7ubuntu0.1+esm2  
14.04 trusty libzmq3 –  4.0.4+dfsg-2ubuntu0.1+esm3  

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References

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