Debian dla-3149 : ruby-nokogiri - security update

critical Nessus Plugin ID 166069

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3149 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-3149-1 [email protected] https://www.debian.org/lts/security/ Sylvain Beucler October 12, 2022 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : ruby-nokogiri Version : 1.10.0+dfsg1-2+deb10u1 CVE ID : CVE-2019-5477 CVE-2020-26247 CVE-2022-24836 Debian Bug : 934802 978967 1009787

Multiple vulnerabilities were discovered in Nokogiri, an HTML/XML/SAX/Reader parser for the Ruby programming language, leading to command injection, XML external entity injection (XXE), and denial-of-service (DoS).

CVE-2019-5477

A command injection vulnerability allows commands to be executed in a subprocess via Ruby's `Kernel.open` method. Processes are vulnerable only if the undocumented method `Nokogiri::CSS::Tokenizer#load_file` is being called with unsafe user input as the filename. This vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by Nokogiri to generate lexical scanner code for parsing CSS queries.

CVE-2020-26247

XXE vulnerability: XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible.

CVE-2022-24836

Nokogiri contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to detect encoding in HTML documents.

For Debian 10 buster, these problems have been fixed in version 1.10.0+dfsg1-2+deb10u1.

We recommend that you upgrade your ruby-nokogiri packages.

For the detailed security status of ruby-nokogiri please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/ruby-nokogiri

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the ruby-nokogiri packages.

Plugin Details

Severity: Critical

ID: 166069

File Name: debian_DLA-3149.nasl

Version: 1.3

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/12/2022

Updated: 1/22/2025

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2019-5477

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:ruby-nokogiri

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2022

Vulnerability Publication Date: 8/16/2019

Reference Information

CVE: CVE-2019-5477, CVE-2020-26247, CVE-2022-24836

Detections

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