Vulnerability Report

CVE-2019-5477

RCE

Title: Nokogiri RCE

RCE

Proof Of Concept

No public PoC currently indexed for CVE-2019-5477.

CWE Category CWE-78
Published Date Aug 16, 2019
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 9.8 CVSS v3.1
Exploit Probability (EPSS)
9.32%

Vulnerability Summary

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.

Impacted Vendors

N
nokogiri 1

Reference Links

https://github.com/sparklemotion/nokogiri/issues/1915 https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc https://hackerone.com/reports/650835 https://lists.debian.org/debian-lts-announce/2019/09/msg00027.html https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html https://lists.debian.org/debian-lts-announce/2022/10/msg00019.html https://security.gentoo.org/glsa/202006-05 https://usn.ubuntu.com/4175-1/ https://github.com/sparklemotion/nokogiri/issues/1915 https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc https://hackerone.com/reports/650835 https://lists.debian.org/debian-lts-announce/2019/09/msg00027.html https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html https://lists.debian.org/debian-lts-announce/2022/10/msg00019.html https://security.gentoo.org/glsa/202006-05 https://usn.ubuntu.com/4175-1/
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2019-5477 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.