Unity Linux 20.1070a Security Update: python3.11 (UTSA-2026-150483)

high Nessus Plugin ID 376611

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-2026-150483 advisory.

Allows the extraction filter to be ignored, allowing symlink targets to point outside the destination directory, and the modification of some file metadata.

You are affected by this vulnerability if using the tarfilemodule to extract untrusted tar archives using TarFile.extractall()or TarFile.extract()using the filter=parameter with a value of dataor tar. See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter for more information.

Note that for Python 3.14 or later the default value of filter=changed from no filtering to `data, so if you are relying on this new default behavior then your usage is also affected.

Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

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 python3.11 package.

Plugin Details

Severity: High

ID: 376611

File Name: unity_linux_UTSA-2026-150483.nasl

Version: 1.2

Type: Local

Family: Unity Linux Local Security Checks

Published: 11/5/2026

Updated: 11/6/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.8

Percentile: 96.61

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2025-4138

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/5/2026

Vulnerability Publication Date: 6/3/2025

Reference Information

CVE: CVE-2025-4138

Detections

Analytics