Ubuntu 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : w3m vulnerability (USN-6580-1)

medium Nessus Plugin ID 188048


The remote Ubuntu host is missing a security update.


The remote Ubuntu 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by a vulnerability as referenced in the USN-6580-1 advisory.

- An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition. (CVE-2023-4255)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Update the affected w3m and / or w3m-img packages.

See Also


Plugin Details

Severity: Medium

ID: 188048

File Name: ubuntu_USN-6580-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/15/2024

Updated: 1/15/2024

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

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.8

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

CVSS Score Source: CVE-2023-4255


Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:esm, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:23.04, cpe:/o:canonical:ubuntu_linux:23.10, p-cpe:/a:canonical:ubuntu_linux:w3m, p-cpe:/a:canonical:ubuntu_linux:w3m-img

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/15/2024

Vulnerability Publication Date: 12/21/2023

Reference Information

CVE: CVE-2023-4255

USN: 6580-1