Detections
Analytics

Ubuntu 22.04 LTS / 24.04 LTS : Authlib vulnerabilities (USN-8065-1)

high Nessus Plugin ID 300274

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 22.04 LTS / 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8065-1 advisory.

 Millie Solem discovered that Authlib did not properly restrict algorithm selection during JWT verification, allowing HMAC verification with asymmetric public keys when no algorithm was specified. A remote attacker could possibly use this issue to bypass signature verification and forge tokens, resulting in authentication bypass or privilege escalation. (CVE-2024-37568)

 Muhammad Noman Ilyas discovered that Authlib did not properly enforce critical header parameter handling during JSON Web Signature verification, leading to unknown critical parameters being incorrectly accepted.
 A remote attacker could possibly use this issue to bypass security policies in mixed deployments, resulting in authentication bypass, replay attacks, or privilege escalation. (CVE-2025-59420)

 Muhammad Noman Ilyas discovered that Authlib did not properly limit the size of JSON Web Signature or JSON Web Token header and signature segments. A remote attacker could possibly use this issue to cause excessive memory or processor consumption, leading to a denial of service. (CVE-2025-61920)

 Muhammad Noman Ilyas discovered that Authlib performed unbounded decompression when processing certain compressed encrypted tokens. A remote attacker could possibly use this issue to send a specially crafted token that can be expanded to a large size during decompression, causing a denial of service.
 (CVE-2025-62706)

 It was discovered that Authlib did not properly bind cached state information to the initiating user session during OAuth authentication flows. A remote attacker could possibly use this issue to perform cross- site request forgery attacks, resulting in unauthorized actions or authentication bypass. This issue only affected Ubuntu 24.04 LTS. (CVE-2025-68158)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected python3-authlib package.

See Also

https://ubuntu.com/security/notices/USN-8065-1

Plugin Details

Severity: High

ID: 300274

File Name: ubuntu_USN-8065-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/2/2026

Updated: 3/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2025-68158

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:python3-authlib, cpe:/o:canonical:ubuntu_linux:22.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/25/2026

Vulnerability Publication Date: 6/9/2024

Reference Information

CVE: CVE-2024-37568, CVE-2025-59420, CVE-2025-61920, CVE-2025-62706, CVE-2025-68158

USN: 8065-1