Skip to content
Fencer Vulns
medium 5.3

CVE-2023-7250 json

Iperf3: possible denial of service

published 2024-03-18 2 y ago modified 2026-11-05 3 d ago also EUVD-2023-59431 , JLSEC-2026-760

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia iperf_jll 3.21.0+0
  • Red Hat Red Hat Enterprise Linux 8 0:3.5-10.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:3.9-13.el9
  • iperf3 Debian 14, Debian 13 3.15-1

debian advisories DEBIAN-CVE-2023-7250

  • iperf3 Ubuntu 22.04 LTS 3.9-1+deb11u1ubuntu0.1
  • iperf3 Ubuntu Pro 16.04 LTS 3.0.11-1ubuntu0.1~esm2
  • iperf3 Ubuntu Pro 18.04 LTS 3.1.3-1ubuntu0.1~esm1
  • iperf3 Ubuntu Pro 20.04 LTS 3.7-3ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2023-7250

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • iperf3 RHEL 9 3.9-13.el9
  • iperf3 RHEL 8 3.5-10.el8_10

red hat advisories RHSA-2024:9185RHSA-2024:4241

  • iperf3 AlmaLinux 9 3.9-13.el9
  • iperf3 AlmaLinux 8 3.5-10.el8_10

almalinux advisories ALSA-2024:9185ALSA-2024:4241

  • iperf3 Rocky Linux 8 3.5-10.el8_10
  • iperf3 Rocky Linux 9 3.9-13.el9_5.1

rocky linux advisories RLSA-2024:4241RLSA-2024:9185

  • iperf3 CBL-Mariner 2.0 3.17-1

azure linux advisories AZL-36892

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-7250 updated cvss 5.3

iperf3: possible denial of service

  • Red Hat Enterprise Linux 7 iperf3
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) iperf3 3.5-10.el8_10
    fixed: vendor fix RHSA-2024:4241
  • Red Hat Enterprise Linux AppStream (v. 9) iperf3 3.9-13.el9
    fixed: vendor fix RHSA-2024:9185

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-25-044-09 updated cvss 5.3

Siemens SCALANCE W700 IEEE 802.11ax

  • Siemens SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) <V3.0.0 Siemens SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) <V3.0.0 Siemens SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0) <V3.0.0 Siemens SCALANCE WAM763-1 (US) (6GK5763-1AL00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) <V3.0.0 Siemens SCALANCE WAM766-1 (ME) (6GK5766-1GE00-7DC0) <V3.0.0
    +13 more products
    Siemens SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (ME) (6GK5766-1GE00-7TC0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) <V3.0.0 Siemens SCALANCE WUB762-1 (6GK5762-1AJ00-1AA0) <V3.0.0 Siemens SCALANCE WUB762-1 iFeatures (6GK5762-1AJ00-2AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3AB0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3DB0) <V3.0.0 Siemens SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) <V3.0.0 Siemens SCALANCE WUM766-1 (ME) (6GK5766-1GE00-3DC0) <V3.0.0 Siemens SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) <V3.0.0
    affected: fixed in V3.0.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
julia iperf_jll
<3.21.0+0
3.21.0+0

Affected products

  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-183 Permissive List of Allowed Inputs

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.