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Ubuntu 20.04 LTS : kramdown vulnerability (USN-6424-1)

critical Nessus Plugin ID 182817

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6424-1 advisory.

 - Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated. (CVE-2021-28834)

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 kramdown and / or ruby-kramdown packages.

See Also

https://ubuntu.com/security/notices/USN-6424-1

Plugin Details

Severity: Critical

ID: 182817

File Name: ubuntu_USN-6424-1.nasl

Version: 1.0

Type: local

Agent: unix

Published: 10/10/2023

Updated: 10/10/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2021-28834

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:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:kramdown, p-cpe:/a:canonical:ubuntu_linux:ruby-kramdown

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: 10/10/2023

Vulnerability Publication Date: 3/19/2021

Reference Information

CVE: CVE-2021-28834

USN: 6424-1