Vulnerabilities in pkg:maven/org.nokogiri/nekohtml

PACKAGE
Advisory Identifier: GHSA-9849-p7jc-9rmv
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Advisory Summary

CVE-2022-24839 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Nekohtml libraries in the Maven ecosystem. The issue involves nekohtml vulnerable to uncontrolled resource consumption. Remediation is available by upgrading affected packages to version 1.9.22.noko2.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/org.nokogiri/nekohtml

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/org.nokogiri/nekohtml. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-9849-p7jc-9rmv CVE-2022-24839 HIGH org.nokogiri:nekohtml vulnerable to Uncontrolled Resource Consumption

CVE-2022-24839 at a Glance

CVE Identifier CVE-2022-24839
GHSA Identifier GHSA-9849-p7jc-9rmv
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Nekohtml
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2022-24839

To remediate this vulnerability, upgrade all affected Nekohtml dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.nokogiri:nekohtml fixed: 1.9.22.noko2 
<dependency>
    <groupId>org.nokogiri</groupId>
    <artifactId>nekohtml</artifactId>
    <version>1.9.22.noko2</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.nokogiri

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2022-24839, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.nokogiri

Analyze the terminal output to locate any version of Nekohtml in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.9.22.noko2), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.nokogiri command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Nekohtml, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary The fork of `org.cyberneko.html` used by Nokogiri (Rubygem) raises a `java.lang.OutOfMemoryError` exception when parsing ill-formed HTML markup. ## Severity The maintainers have evaluated this as [**High Severity** 7.5 (CVSS3.1)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). ## Mitigation Upgrade to `>= 1.9.22.noko2`. ## Credit This vulnerability was reported by [이형관 (windshock)](https://www.linkedin.com/in/windshock/). ## References [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption ## Notes The upstream library `org.cyberneko.html` is no longer maintained. Nokogiri uses its own fork of this library located at https://github.com/sparklemotion/nekohtml and this CVE applies only to that fork. Other forks of nekohtml may have a similar vulnerability.

CVE-2022-24839 Affected Nekohtml Versions

1 component(s)
Fixed Versions:
1.9.22.noko2
Product / Package Ecosystem Affected Versions Fixed Version
org.nokogiri:nekohtml
maven/org.nokogiri/nekohtml
Maven
< 1.9.22.noko2
1.9.22.noko2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv
NVD — CVE-2022-24839 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-24839
Security Fix Commit FIX COMMIT
https://github.com/sparklemotion/nekohtml/commit/a800fce3b079def130ed42a408ff1d09f89e773d
Nekohtml Source Repository REPOSITORY
https://github.com/sparklemotion/nekohtml
Nekohtml Security Information SECURITY
https://www.oracle.com/security-alerts/cpujul2022.html

Frequently Asked Questions

What is CVE-2022-24839?
CVE-2022-24839 is a security vulnerability in Nekohtml involving nekohtml vulnerable to Uncontrolled Resource Consumption under CWE-400: Uncontrolled Resource Consumption.
Which Nekohtml versions are affected?
Affected versions include releases prior to 1.9.22.noko2 across affected packages: org.nokogiri:nekohtml.
What version fixes CVE-2022-24839?
Upgrading to 1.9.22.noko2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nekohtml affected?
Yes, org.nokogiri:nekohtml is affected in releases prior to 1.9.22.noko2. Upgrade your dependency to 1.9.22.noko2 or later.
What is the CVSS score of CVE-2022-24839?
CVE-2022-24839 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2022-24839?
CVE-2022-24839 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Maven dependencies for CVE-2022-24839?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.nokogiri'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9849-p7jc-9rmv",
  "modified" : "2023-06-22T19:58:54Z",
  "published" : "2023-06-22T19:58:54Z",
  "aliases" : [ "CVE-2022-24839" ],
  "summary" : "org.nokogiri:nekohtml vulnerable to Uncontrolled Resource Consumption",
  "details" : "## Summary\n\nThe fork of `org.cyberneko.html` used by Nokogiri (Rubygem) raises a `java.lang.OutOfMemoryError` exception when parsing ill-formed HTML markup.\n\n## Severity\n\nThe maintainers have evaluated this as [**High Severity** 7.5 (CVSS3.1)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).\n\n## Mitigation\n\nUpgrade to `>= 1.9.22.noko2`.\n\n## Credit\n\nThis vulnerability was reported by [이형관 (windshock)](https://www.linkedin.com/in/windshock/).\n\n## References\n\n[CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption\n\n## Notes\n\nThe upstream library `org.cyberneko.html` is no longer maintained. Nokogiri uses its own fork of this library located at https://github.com/sparklemotion/nekohtml and this CVE applies only to that fork. Other forks of nekohtml may have a similar vulnerability.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.nokogiri:nekohtml"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.9.22.noko2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-24839"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nekohtml/commit/a800fce3b079def130ed42a408ff1d09f89e773d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sparklemotion/nekohtml"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujul2022.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-22T19:58:54Z",
    "nvd_published_at" : "2022-04-11T22:15:07Z"
  }
}