An iperf3 security update has been released for Ubuntu Linux 22.04 LTS and 23.04.

[USN-6431-2] iperf3 vulnerability

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Ubuntu Security Notice USN-6431-2
October 16, 2023

iperf3 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

iperf3 could be made to crash if it received specially crafted network
traffic.

Software Description:
- iperf3: Internet Protocol bandwidth measuring tool

Details:

USN-6431-1 fixed a vulnerability in iperf3. This update provides
the corresponding update for Ubuntu 22.04 LTS and Ubuntu 23.04.

Original advisory details:

 It was discovered that iperf3 did not properly manage certain inputs,
 which could lead to a crash. A remote attacker could possibly use this
 issue to cause a denial of service. (CVE-2023-38403)

Update instructions:

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

Ubuntu 23.04:
  iperf3                          3.12-1+deb12u1build0.23.04.1
  libiperf0                       3.12-1+deb12u1build0.23.04.1

Ubuntu 22.04 LTS:
  iperf3                          3.9-1+deb11u1build0.22.04.1
  libiperf0                       3.9-1+deb11u1build0.22.04.1

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

References:
  https://ubuntu.com/security/notices/USN-6431-2
  https://ubuntu.com/security/notices/USN-6431-1
  CVE-2023-38403

Package Information:
https://launchpad.net/ubuntu/+source/iperf3/3.12-1+deb12u1build0.23.04.1
https://launchpad.net/ubuntu/+source/iperf3/3.9-1+deb11u1build0.22.04.1