Permissive Whitelist Affecting iperf3 package, versions <3.7-3ubuntu0.1~esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-UBUNTU2004-IPERF3-6467197
  • published22 Mar 2026
  • disclosed18 Mar 2024

Introduced: 18 Mar 2024

CVE-2023-7250  (opens in a new tab)
CWE-183  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 iperf3 to version 3.7-3ubuntu0.1~esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream iperf3 package and not the iperf3 package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

A flaw was found in iperf, a utility for testing network performance using TCP, UDP, and SCTP. A malicious or malfunctioning client can send less than the expected amount of data to the iperf server, which can cause the server to hang indefinitely waiting for the remainder or until the connection gets closed. This will prevent other connections to the server, leading to a denial of service.

CVSS Base Scores

version 3.1