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Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : HTML Tidy vulnerability (USN-6483-1)

critical Nessus Plugin ID 185779

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 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-6483-1 advisory.

 Neeraj Pal discovered that HTML Tidy incorrectly handled parsing certain HTML data. If a user or automated system were tricked into parsing specially crafted HTML data, a remote attacker could cause HTML Tidy to consume resources, leading to a denial of service, or possibly execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

Solution

Update the affected libtidy-dev, libtidy5deb1 and / or tidy packages.

See Also

https://ubuntu.com/security/notices/USN-6483-1

Plugin Details

Severity: Critical

ID: 185779

File Name: ubuntu_USN-6483-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 11/15/2023

Updated: 8/28/2024

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: 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-2021-33391

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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:23.10, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:tidy, cpe:/o:canonical:ubuntu_linux:23.04, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libtidy5deb1, p-cpe:/a:canonical:ubuntu_linux:libtidy-dev

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: 11/15/2023

Vulnerability Publication Date: 2/17/2023

Reference Information

CVE: CVE-2021-33391

USN: 6483-1