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CVE-2021-41098

Improper Restriction of XML External Entity Reference (XXE) in Nokogiri on JRuby

Published: Sep 27, 2021Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-611
7.5HIGH
NVD MITRE
EPSS Score
1.4%
Top 29.7%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-611

Affected Products

sparklemotion
oss-project
nokogiriLibrary
OSS Libraries / generic-library
nokogiri
oss-project
nokogiriLibrary
OSS Libraries / generic-library
RubyGems
package-ecosystem
nokogiri
OSS Libraries

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Initial Access
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References

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
github.com
https://github.com/sparklemotion/nokogiri/commit/5bf729ff3cc84709ee3c3248c981584088bf9f6d
github.com
https://nvd.nist.gov/vuln/detail/CVE-2021-41098
nvd.nist.gov
and 2 more references View all →

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