Debian dla-4583 : idle-python3.9 - security update

high Nessus Plugin ID 314932

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4583 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4583-1 [email protected] https://www.debian.org/lts/security/ Arnaud Rebillout May 15, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : python3.9 Version : 3.9.2-1+deb11u7 CVE ID : CVE-2025-13462 CVE-2026-0672 CVE-2026-2297 CVE-2026-3644 CVE-2026-4224 CVE-2026-4519 Debian Bug :

Multiple vulnerabilities were discovered in Python 3.9.

CVE-2025-13462

The tarfile module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other implementations.

CVE-2026-0672

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

CVE-2026-2297

The import hook in CPython that handles legacy *.pyc files (SourcelessFileLoader) is incorrectly handled in FileLoader (a base class) and so does not use io.open_code() to read the .pyc files.
sys.audit handlers for this audit event therefore do not fire.

CVE-2026-3644

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().

CVE-2026-4224

When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.

CVE-2026-4519

The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open().

For Debian 11 bullseye, these problems have been fixed in version 3.9.2-1+deb11u7.

We recommend that you upgrade your python3.9 packages.

For the detailed security status of python3.9 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/python3.9

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the idle-python3.9 packages.

Plugin Details

Severity: High

ID: 314932

File Name: debian_DLA-4583.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 5/15/2026

Updated: 5/15/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2026-4519

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.9

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

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

CVSS v4

Risk Factor: High

Base Score: 7

Threat Score: 3.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:idle-python3.9, p-cpe:/a:debian:debian_linux:libpython3.9-minimal, p-cpe:/a:debian:debian_linux:libpython3.9-dbg, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:python3.9, p-cpe:/a:debian:debian_linux:libpython3.9-dev, p-cpe:/a:debian:debian_linux:python3.9-minimal, p-cpe:/a:debian:debian_linux:python3.9-dbg, p-cpe:/a:debian:debian_linux:libpython3.9-testsuite, p-cpe:/a:debian:debian_linux:libpython3.9, p-cpe:/a:debian:debian_linux:python3.9-venv, p-cpe:/a:debian:debian_linux:python3.9-dev, p-cpe:/a:debian:debian_linux:libpython3.9-stdlib, p-cpe:/a:debian:debian_linux:python3.9-full, p-cpe:/a:debian:debian_linux:python3.9-examples, p-cpe:/a:debian:debian_linux:python3.9-doc

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/15/2026

Vulnerability Publication Date: 1/20/2026

Reference Information

CVE: CVE-2025-13462, CVE-2026-0672, CVE-2026-2297, CVE-2026-3644, CVE-2026-4224, CVE-2026-4519

Detections

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