CVE-2019-5477

Published: 16 August 2019

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.

Priority

Medium

CVSS 3 base score: 9.8

Status

Package Release Status
ruby-nokogiri
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(1.10.4+dfsg1-1)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(1.10.4+dfsg1-1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.8.2-1ubuntu0.1)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (1.6.7.2-3ubuntu0.1)
Ubuntu 14.04 ESM (Trusty Tahr) Needed

Ubuntu 12.04 ESM (Precise Pangolin) Does not exist