CVE-2021-41098 Information

Description

Nokogiri is a Rubygem providing HTML XML SAX and Reader parsers with XPath and CSS selector support. In Nokogiri v1.12.4 and earlier on JRuby only the SAX parser resolves external entities by default. Users of Nokogiri on JRuby who parse untrusted documents using any of these classes are affected: Nokogiri::XML::SAX::Parse Nokogiri::HTML4::SAX::Parser or its alias Nokogiri::HTML::SAX::Parser Nokogiri::XML::SAX::PushParser and Nokogiri::HTML4::SAX::PushParser or its alias Nokogiri::HTML::SAX::PushParser. JRuby users should upgrade to Nokogiri v1.12.5 or later to receive a patch for this issue. There are no workarounds available for v1.12.4 or earlier. CRuby users are not affected.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

https://github.com/sparklemotion/nokogiri/commit/5bf729ff3cc84709ee3c3248c981584088bf9f6d https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5