CVE-2019-5477 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  9.8 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/sparklemotion/nokogiri/issues/1915 Patch  Third Party Advisory 
https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc Release Notes 
https://hackerone.com/reports/650835 Permissions Required 
https://lists.debian.org/debian-lts-announce/2019/09/msg00027.html Mailing List  Third Party Advisory 
https://security.gentoo.org/glsa/202006-05 Third Party Advisory 
https://usn.ubuntu.com/4175-1/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') cwe source acceptance level NIST   Contributor acceptance level HackerOne  

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-5477
NVD Published Date:
08/16/2019
NVD Last Modified:
10/16/2020
Source:
HackerOne