CVE-2021-41098 Improper Restriction of XML External Entity Reference (XXE) in Nokogiri on JRuby

2021-09-2719:35:11

CWE-611

GitHub_M

www.cve.org

vulnerability

xxe

nokogiri

jruby

security

patch

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7.8

Confidence

High

EPSS

0.001

Percentile

49.1%

JSON

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.

CNA Affected

[
  {
    "product": "nokogiri",
    "vendor": "sparklemotion",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.12.5"
      }
    ]
  }
]