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Amazon Linux 2023 : python3, python3-devel, python3-idle (ALAS2023-2025-1033)

medium Nessus Plugin ID 240303

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-1033 advisory.

 There is an issue in CPython when using `bytes.decode(unicode_escape, error=ignore|replace)`. If you are not using the unicode_escape encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError. (CVE-2025-4516)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'dnf update python3.9 --releasever 2023.7.20250623' to update your system.

See Also

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

https://alas.aws.amazon.com/cve/html/CVE-2025-4516.html

https://alas.aws.amazon.com/AL2023/ALAS-2025-1033.html

Plugin Details

Severity: Medium

ID: 240303

File Name: al2023_ALAS2023-2025-1033.nasl

Version: 1.1

Type: local

Agent: unix

Published: 6/23/2025

Updated: 6/23/2025

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2025-4516

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

CVSS v4

Risk Factor: Medium

Base Score: 5.9

Threat Score: 2

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python3-idle, p-cpe:/a:amazon:linux:python-unversioned-command, p-cpe:/a:amazon:linux:python3, p-cpe:/a:amazon:linux:python3-test, p-cpe:/a:amazon:linux:python3.9-debuginfo, p-cpe:/a:amazon:linux:python3-devel, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3-debug, p-cpe:/a:amazon:linux:python3-libs, p-cpe:/a:amazon:linux:python3-tkinter, p-cpe:/a:amazon:linux:python3.9-debugsource

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2025

Vulnerability Publication Date: 5/15/2025

Reference Information

CVE: CVE-2025-4516