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
Status
| Package | Release | Status |
|---|---|---|
|
ruby-nokogiri Launchpad, Ubuntu, Debian |
bionic |
Released
(1.8.2-1ubuntu0.1)
|
| disco |
Released
(1.10.0+dfsg1-2ubuntu0.1)
|
|
| eoan |
Released
(1.10.3+dfsg1-2ubuntu0.1)
|
|
| focal |
Not vulnerable
(1.10.4+dfsg1-1)
|
|
| groovy |
Not vulnerable
(1.10.4+dfsg1-1)
|
|
| hirsute |
Not vulnerable
(1.10.4+dfsg1-1)
|
|
| impish |
Not vulnerable
(1.10.4+dfsg1-1)
|
|
| jammy |
Not vulnerable
(1.10.4+dfsg1-1)
|
|
| trusty |
Released
(1.6.1+ds-1ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Needs triage
|
|
| xenial |
Released
(1.6.7.2-3ubuntu0.1)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| 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 |