Detections
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Amazon Linux 2023 : python3.11, python3.11-devel, python3.11-idle (ALAS2023-2026-3356)

critical Nessus Plugin ID 374345

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3356 advisory.

 tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter=tar to write files outside the destination directory, subject to the permissions of the extracting process.

 This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.
 (CVE-2026-114583)

 Python has added a denylist for known compromised certificates to the ssl module to ensure user safety even without certificate revocation configured. Known compromised certificates will automatically be rejected regardless of the SSLContext policy configuration. (CVE-2026-115557)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'dnf update python3.11 --releasever 2023.12.20261102' or or 'dnf update --advisory ALAS2023-2026-3356 --releasever 2023.12.20261102' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-3356.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-114583.html

https://explore.alas.aws.amazon.com/CVE-2026-115557.html

Plugin Details

Severity: Critical

ID: 374345

File Name: al2023_ALAS2023-2026-3356.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/30/2026

Updated: 10/30/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 92.83

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-115557

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.4

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3.11-debug, p-cpe:/a:amazon:linux:python3.11-debuginfo, p-cpe:/a:amazon:linux:python3.11-debugsource, p-cpe:/a:amazon:linux:python3.11-devel, p-cpe:/a:amazon:linux:python3.11-idle, p-cpe:/a:amazon:linux:python3.11-libs, p-cpe:/a:amazon:linux:python3.11-test, p-cpe:/a:amazon:linux:python3.11-tkinter, p-cpe:/a:amazon:linux:python3.11

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/30/2026

Vulnerability Publication Date: 10/22/2026

Reference Information

CVE: CVE-2026-114583, CVE-2026-115557

IAVA: 2026-A-1207