Detections
Analytics

Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : Libwebsockets vulnerabilities (USN-8024-1)

high Nessus Plugin ID 298804

Synopsis

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

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8024-1 advisory.

 Raffaele Bova discovered that Libwebsockets incorrectly handled memory when the upgrade header is not valid in the WebSocket server. An attacker could possibly use this issue to cause a denial of service.
 (CVE-2025-11677)

 Raffaele Bova discovered that Libwebsockets did not properly check the size of the destination buffer in the async-dns component. An attacker could possibly use this issue to cause applications to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-11678)

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 packages.

See Also

https://ubuntu.com/security/notices/USN-8024-1

Plugin Details

Severity: High

ID: 298804

File Name: ubuntu_USN-8024-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2/12/2026

Updated: 2/12/2026

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: 5.5

CVSS v2

Risk Factor: High

Base Score: 8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2025-11678

CVSS v3

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.6

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

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

CVSS v4

Risk Factor: High

Base Score: 7.5

Threat Score: 4.8

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libwebsockets-test-server-common, p-cpe:/a:canonical:ubuntu_linux:libwebsockets-test-server, p-cpe:/a:canonical:ubuntu_linux:libwebsockets15, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libwebsockets-dev, p-cpe:/a:canonical:ubuntu_linux:libwebsockets-evlib-glib, p-cpe:/a:canonical:ubuntu_linux:libwebsockets-evlib-uv, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libwebsockets-evlib-ev, p-cpe:/a:canonical:ubuntu_linux:libwebsockets16, p-cpe:/a:canonical:ubuntu_linux:libwebsockets19t64

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/11/2026

Vulnerability Publication Date: 10/20/2025

Reference Information

CVE: CVE-2025-11677, CVE-2025-11678

USN: 8024-1