Debian dla-4352 : python-authlib-doc - security update

high Nessus Plugin ID 271941

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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-4352 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4352-1 [email protected] https://www.debian.org/lts/security/ Daniel Leidert October 29, 2025 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : python-authlib Version : 0.15.4-1+deb11u1 CVE ID : CVE-2024-37568 CVE-2025-59420 CVE-2025-61920 CVE-2025-62706

Multiple vulnerabilities have been found in python-authlib, a Python library for OAuth and OpenID Connect servers.

CVE-2024-37568

Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key.

CVE-2025-59420

Authlibs JWS verification accepts tokens that declare unknown critical header parameters (crit), violating RFC 7515 mustunderstand semantics.
An attacker can craft a signed token with a critical header that strict verifiers reject but Authlib accepts. In mixedlanguage fleets, this enables splitbrain verification and can lead to policy bypass, replay, or privilege escalation.

CVE-2025-61920

Authlibs JOSE implementation accepts unbounded JWS/JWT header and signature segments which can lead to a DoS during verification.

CVE-2025-62706

Authlibs JWE zip=DEF path performs unbounded DEFLATE decompression which can lead to a DoS.

For Debian 11 bullseye, these problems have been fixed in version 0.15.4-1+deb11u1.

We recommend that you upgrade your python-authlib packages.

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

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-authlib-doc packages.

Plugin Details

Severity: High

ID: 271941

File Name: debian_DLA-4352.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/29/2025

Updated: 10/29/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2024-37568

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:python-authlib-doc, p-cpe:/a:debian:debian_linux:python3-authlib

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/29/2025

Vulnerability Publication Date: 6/9/2024

Reference Information

CVE: CVE-2024-37568, CVE-2025-59420, CVE-2025-61920, CVE-2025-62706

Detections

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