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Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : Python vulnerability (USN-7951-1)

medium Nessus Plugin ID 284663

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 / 25.10 host has packages installed that are affected by a vulnerability as referenced in the USN-7951-1 advisory.

 It was discovered that Python's http.client did not properly handle the Content-Length header in HTTP responses. A malicious server could exploit this to cause Python to allocate excessive memory, leading to a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu 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 packages.

See Also

https://ubuntu.com/security/notices/USN-7951-1

Plugin Details

Severity: Medium

ID: 284663

File Name: ubuntu_USN-7951-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/14/2026

Updated: 1/14/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2025-13836

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libpython3.13-dev, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libpython3.14-stdlib, p-cpe:/a:canonical:ubuntu_linux:python3.8-full, p-cpe:/a:canonical:ubuntu_linux:libpython3.11, p-cpe:/a:canonical:ubuntu_linux:python3.10-examples, p-cpe:/a:canonical:ubuntu_linux:python3.14-venv, p-cpe:/a:canonical:ubuntu_linux:python3.13-dev, p-cpe:/a:canonical:ubuntu_linux:idle-python3.11, p-cpe:/a:canonical:ubuntu_linux:python3.14-dev, p-cpe:/a:canonical:ubuntu_linux:python3.10-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.12, p-cpe:/a:canonical:ubuntu_linux:libpython3.11-stdlib, p-cpe:/a:canonical:ubuntu_linux:libpython3.8-dev, p-cpe:/a:canonical:ubuntu_linux:libpython3.10-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.13-venv, p-cpe:/a:canonical:ubuntu_linux:libpython3.12-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.11-venv, p-cpe:/a:canonical:ubuntu_linux:python3.9-venv, p-cpe:/a:canonical:ubuntu_linux:libpython3.10-testsuite, p-cpe:/a:canonical:ubuntu_linux:python3.9-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.12-examples, p-cpe:/a:canonical:ubuntu_linux:libpython3.12t64, p-cpe:/a:canonical:ubuntu_linux:python3.9-dev, p-cpe:/a:canonical:ubuntu_linux:python3.8-dev, p-cpe:/a:canonical:ubuntu_linux:python3.13, p-cpe:/a:canonical:ubuntu_linux:python3.13-examples, p-cpe:/a:canonical:ubuntu_linux:python3.14-nopie, p-cpe:/a:canonical:ubuntu_linux:python3.13-nopie, p-cpe:/a:canonical:ubuntu_linux:python3.9-examples, p-cpe:/a:canonical:ubuntu_linux:python3.11-minimal, p-cpe:/a:canonical:ubuntu_linux:libpython3.11-testsuite, p-cpe:/a:canonical:ubuntu_linux:python3.13-gdbm, p-cpe:/a:canonical:ubuntu_linux:idle-python3.8, p-cpe:/a:canonical:ubuntu_linux:python3.14, p-cpe:/a:canonical:ubuntu_linux:python3.13-full, p-cpe:/a:canonical:ubuntu_linux:python3.12-full, p-cpe:/a:canonical:ubuntu_linux:python3.12-venv, p-cpe:/a:canonical:ubuntu_linux:python3.11-nopie, p-cpe:/a:canonical:ubuntu_linux:python3.10-full, p-cpe:/a:canonical:ubuntu_linux:python3.10-venv, p-cpe:/a:canonical:ubuntu_linux:libpython3.14, cpe:/o:canonical:ubuntu_linux:25.04, p-cpe:/a:canonical:ubuntu_linux:libpython3.11-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.8, p-cpe:/a:canonical:ubuntu_linux:libpython3.9-testsuite, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libpython3.13-stdlib, p-cpe:/a:canonical:ubuntu_linux:libpython3.14-dev, p-cpe:/a:canonical:ubuntu_linux:python3.13-minimal, p-cpe:/a:canonical:ubuntu_linux:libpython3.13-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.14-gdbm, p-cpe:/a:canonical:ubuntu_linux:idle-python3.9, p-cpe:/a:canonical:ubuntu_linux:libpython3.14-testsuite, p-cpe:/a:canonical:ubuntu_linux:libpython3.9-dev, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:canonical:ubuntu_linux:python3.9-full, p-cpe:/a:canonical:ubuntu_linux:libpython3.13-testsuite, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libpython3.12-testsuite, p-cpe:/a:canonical:ubuntu_linux:python3.10-nopie, p-cpe:/a:canonical:ubuntu_linux:python3.9, p-cpe:/a:canonical:ubuntu_linux:libpython3.9-stdlib, p-cpe:/a:canonical:ubuntu_linux:libpython3.8-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.10-dev, p-cpe:/a:canonical:ubuntu_linux:libpython3.9-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.8-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.14-tk, p-cpe:/a:canonical:ubuntu_linux:python3.8-examples, p-cpe:/a:canonical:ubuntu_linux:idle-python3.14, p-cpe:/a:canonical:ubuntu_linux:python3.11-examples, p-cpe:/a:canonical:ubuntu_linux:libpython3.11-dev, p-cpe:/a:canonical:ubuntu_linux:libpython3.8-testsuite, p-cpe:/a:canonical:ubuntu_linux:python3.13-tk, p-cpe:/a:canonical:ubuntu_linux:libpython3.9, p-cpe:/a:canonical:ubuntu_linux:idle-python3.10, p-cpe:/a:canonical:ubuntu_linux:libpython3.12-stdlib, p-cpe:/a:canonical:ubuntu_linux:python3.10, p-cpe:/a:canonical:ubuntu_linux:libpython3.13, p-cpe:/a:canonical:ubuntu_linux:libpython3.12-dev, p-cpe:/a:canonical:ubuntu_linux:libpython3.10-stdlib, p-cpe:/a:canonical:ubuntu_linux:python3.12-nopie, p-cpe:/a:canonical:ubuntu_linux:libpython3.10-dev, p-cpe:/a:canonical:ubuntu_linux:python3.11-full, p-cpe:/a:canonical:ubuntu_linux:libpython3.10, p-cpe:/a:canonical:ubuntu_linux:python3.14-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.14-examples, p-cpe:/a:canonical:ubuntu_linux:idle-python3.13, p-cpe:/a:canonical:ubuntu_linux:libpython3.8, p-cpe:/a:canonical:ubuntu_linux:python3.14-full, p-cpe:/a:canonical:ubuntu_linux:idle-python3.12, p-cpe:/a:canonical:ubuntu_linux:python3.11, p-cpe:/a:canonical:ubuntu_linux:python3.11-dev, p-cpe:/a:canonical:ubuntu_linux:python3.12-dev, p-cpe:/a:canonical:ubuntu_linux:python3.12-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.8-venv, p-cpe:/a:canonical:ubuntu_linux:libpython3.8-stdlib, p-cpe:/a:canonical:ubuntu_linux:libpython3.14-minimal

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/12/2026

Vulnerability Publication Date: 12/1/2025

Reference Information

CVE: CVE-2025-13836

USN: 7951-1