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Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: iperf3 (UTSA-2026-106773)

high Nessus Plugin ID 344447

Synopsis

The Unity Linux host is missing one or more security updates.

Description

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-106773 advisory.

 A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control- channel JSON with oversized numeric parameters, such as `parallel` and `len`, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected iperf3 package.

See Also

http://www.nessus.org/u?da4050a2

Plugin Details

Severity: High

ID: 344447

File Name: unity_linux_UTSA-2026-106773.nasl

Version: 1.1

Type: Local

Published: 9/9/2026

Updated: 9/9/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.7

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-71217

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/10/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2026-71217