USN-6431-1 is a security advisory issued by Ubuntu that addresses vulnerabilities in the iperf3 package.

What are the affected software versions?

The affected software versions are iperf3 3.7-3ubuntu0.1~esm1 on Ubuntu 20.04, iperf3 3.1.3-1ubuntu0.1~esm1 on Ubuntu 18.04, and iperf3 3.0.11-1ubuntu0.1~esm2 on Ubuntu 16.04.

What is the vulnerability description?

The vulnerability allows a remote attacker to cause a denial of service by crashing iperf3 due to improper input handling.

Is there a fix available?

Yes, the remedy for the vulnerability is to update to iperf3 package version 3.7-3ubuntu0.1~esm1 on Ubuntu 20.04, 3.1.3-1ubuntu0.1~esm1 on Ubuntu 18.04, or 3.0.11-1ubuntu0.1~esm2 on Ubuntu 16.04.

Where can I find more information?

You can find more information in the Ubuntu Security Notice USN-6431-1 and the associated references.

Vulnerability/
USN-6431-1

16/10/2023

USN-6431-1: iperf3 vulnerabilities

First published: Mon Oct 16 2023(Updated: )

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) Jorge Sancho Larraz discovered that iperf3 did not properly manage certain inputs, which could cause the server process to stop responding, waiting for input on the control connection. A remote attacker could possibly use this issue to cause a denial of service. (LP: #2038654)

Affected Software	Affected Version	How to fix
All of
ubuntu/iperf3	<3.7-3ubuntu0.1~esm1	3.7-3ubuntu0.1~esm1
	=20.04
All of
ubuntu/libiperf0	<3.7-3ubuntu0.1~esm1	3.7-3ubuntu0.1~esm1
	=20.04
All of
ubuntu/iperf3	<3.1.3-1ubuntu0.1~esm1	3.1.3-1ubuntu0.1~esm1
	=18.04
All of
ubuntu/libiperf0	<3.1.3-1ubuntu0.1~esm1	3.1.3-1ubuntu0.1~esm1
	=18.04
All of
ubuntu/iperf3	<3.0.11-1ubuntu0.1~esm2	3.0.11-1ubuntu0.1~esm2
	=16.04
All of
ubuntu/libiperf0	<3.0.11-1ubuntu0.1~esm2	3.0.11-1ubuntu0.1~esm2
	=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

CVE-2023-38403

Frequently Asked Questions

What is USN-6431-1?
USN-6431-1 is a security advisory issued by Ubuntu that addresses vulnerabilities in the iperf3 package.
What are the affected software versions?
The affected software versions are iperf3 3.7-3ubuntu0.1~esm1 on Ubuntu 20.04, iperf3 3.1.3-1ubuntu0.1~esm1 on Ubuntu 18.04, and iperf3 3.0.11-1ubuntu0.1~esm2 on Ubuntu 16.04.
What is the vulnerability description?
The vulnerability allows a remote attacker to cause a denial of service by crashing iperf3 due to improper input handling.
Is there a fix available?
Yes, the remedy for the vulnerability is to update to iperf3 package version 3.7-3ubuntu0.1~esm1 on Ubuntu 20.04, 3.1.3-1ubuntu0.1~esm1 on Ubuntu 18.04, or 3.0.11-1ubuntu0.1~esm2 on Ubuntu 16.04.
Where can I find more information?
You can find more information in the Ubuntu Security Notice USN-6431-1 and the associated references.

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