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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