Debian dla-4461 : python-tornado-doc - security update

medium Nessus Plugin ID 297501

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-4461 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4461-1 [email protected] https://www.debian.org/lts/security/ Daniel Leidert February 01, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : python-tornado Version : 6.1.0-1+deb11u3 CVE ID : CVE-2025-67724 CVE-2025-67725 CVE-2025-67726 Debian Bug : 1122660 1122661 1122663

Tornado is a scalable, non-blocking Python web framework and asynchronous networking library.

CVE-2025-67724

Custom reason phrases can cause multiple vulnerabilities (like XSS, header injection, ...) due to being used unescaped in HTTP headers.

CVE-2025-67725

A single maliciously crafted HTTP request can cause a possible DoS due to quadratic performance of repeated header lines.

CVE-2025-67726

An inefficient algorithm when parsing parameters for HTTP header values can potentially cause a DoS.

For Debian 11 bullseye, these problems have been fixed in version 6.1.0-1+deb11u3.

We recommend that you upgrade your python-tornado packages.

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

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 Attachment:
signature.asc Description: This is a digitally signed message part

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 python-tornado-doc packages.

Plugin Details

Severity: Medium

ID: 297501

File Name: debian_DLA-4461.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/1/2026

Updated: 2/1/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2025-67724

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:python3-tornado, p-cpe:/a:debian:debian_linux:python-tornado-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: 2/1/2026

Vulnerability Publication Date: 12/12/2025

Reference Information

CVE: CVE-2025-67724, CVE-2025-67725, CVE-2025-67726

Detections

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