CVE-2019-5477

Publication date 16 August 2019

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A command injection vulnerability in Nokogiri v1.10.3 and earlier 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. The underlying vulnerability was addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.

From the Ubuntu Security Team

USN-4175-1 addressed CVE-2019-5477 in Nokogiri. This update provides the corresponding fix for Ubuntu 14.04 ESM.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ruby-nokogiri	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Fixed 1.10.3+dfsg1-2ubuntu0.1
	19.04 disco	Fixed 1.10.0+dfsg1-2ubuntu0.1
	18.04 LTS bionic	Fixed 1.8.2-1ubuntu0.1
	16.04 LTS xenial	Fixed 1.6.7.2-3ubuntu0.1
	14.04 LTS trusty	Fixed 1.6.1+ds-1ubuntu0.1~esm1 Ubuntu Pro

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Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-4175-1
Nokogiri vulnerability
5 November 2019