CVE-2021-41098
Published: 27 September 2021
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ruby-nokogiri Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(JRuby implementation not included)
|
| focal |
Not vulnerable
(JRuby implementation not included)
|
|
| hirsute |
Not vulnerable
(JRuby implementation not included)
|
|
| trusty |
Not vulnerable
(JRuby implementation not included)
|
|
| upstream |
Not vulnerable
(debian: jruby implementation not shiped)
|
|
| xenial |
Not vulnerable
(JRuby implementation not included)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |