CVE-2019-5477

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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://hackerone.com/reports/650835	Permissions Required
https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc	Release Notes
https://github.com/sparklemotion/nokogiri/issues/1915	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00027.html	Mailing List Third Party Advisory
https://usn.ubuntu.com/4175-1/	Third Party Advisory
https://security.gentoo.org/glsa/202006-05	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00019.html	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:19.04:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Information

Published : 2019-08-16 09:15

Updated : 2022-10-14 11:46

NVD link : CVE-2019-5477

Mitre link : CVE-2019-5477

JSON object : View

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Products Affected

debian

debian_linux

canonical

ubuntu_linux

nokogiri

nokogiri

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9.8 /10