GHSA-gx8x-g87m-h5q6: Nokogiri Denial of Service Vulnerability

HIGH
Share
CVSS 7.5
CWE-400
Published
Advisory Summary

GHSA-gx8x-g87m-h5q6 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Nokogiri libraries in the RubyGems ecosystem. The issue involves denial of service (dos) in nokogiri on jruby. Remediation is available by upgrading affected packages to version 1.13.4.

GHSA-gx8x-g87m-h5q6 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-gx8x-g87m-h5q6
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Nokogiri
Package Ecosystem RubyGems
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 GHSA-gx8x-g87m-h5q6

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

nokogiri fixed: 1.13.4 
Upgrade nokogiri to 1.13.4
Verify Direct and Transitive Dependencies

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

inspect dependencies for nokogiri

How to Check if You Are Affected

To determine whether your application is affected by GHSA-gx8x-g87m-h5q6, inspect your project dependencies for Nokogiri:

inspect dependencies for nokogiri

Analyze the terminal output to locate any version of Nokogiri in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.13.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

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 Nokogiri, 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 Nokogiri `v1.13.4` updates the vendored `org.cyberneko.html` library to `1.9.22.noko2` which addresses [CVE-2022-24839](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv). That CVE is rated 7.5 (High Severity). See [GHSA-9849-p7jc-9rmv](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv) for more information. Please note that this advisory only applies to the **JRuby** implementation of Nokogiri `< 1.13.4`. ## Mitigation Upgrade to Nokogiri `>= 1.13.4`. ## Impact ### [CVE-2022-24839](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv) in nekohtml - **Severity**: High 7.5 - **Type**: [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption - **Description**: The fork of `org.cyberneko.html` used by Nokogiri (Rubygem) raises a `java.lang.OutOfMemoryError` exception when parsing ill-formed HTML markup. - **See also**: [GHSA-9849-p7jc-9rmv](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv)

GHSA-gx8x-g87m-h5q6 Affected Nokogiri Versions

1 component(s)
Fixed Versions:
1.13.4
Product / Package Ecosystem Affected Versions Fixed Version
nokogiri
gem/nokogiri
RubyGems
< 1.13.4
1.13.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv
GitHub Advisory / Wiki ADVISORY
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-gx8x-g87m-h5q6
NVD — GHSA-gx8x-g87m-h5q6 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-24839
Security Fix Commit FIX COMMIT
https://github.com/sparklemotion/nekohtml/commit/a800fce3b079def130ed42a408ff1d09f89e773d
Nokogiri Source Repository REPOSITORY
https://github.com/sparklemotion/nokogiri
Nokogiri Release RELEASE
https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.4
Nokogiri Security Information SECURITY
https://groups.google.com/g/ruby-security-ann/c/vX7qSjsvWis/m/TJWN4oOKBwAJ?utm_medium=email&utm_source=footer

Frequently Asked Questions

What is GHSA-gx8x-g87m-h5q6?
GHSA-gx8x-g87m-h5q6 is a security vulnerability in Nokogiri involving Denial of Service (DoS) in Nokogiri on JRuby under CWE-400: Uncontrolled Resource Consumption.
Which Nokogiri versions are affected?
Affected versions include releases prior to 1.13.4 across affected packages: nokogiri.
What version fixes GHSA-gx8x-g87m-h5q6?
Upgrading to 1.13.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nokogiri affected?
Yes, nokogiri is affected in releases prior to 1.13.4. Upgrade your dependency to 1.13.4 or later.
What is the CVSS score of GHSA-gx8x-g87m-h5q6?
GHSA-gx8x-g87m-h5q6 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 GHSA-gx8x-g87m-h5q6?
GHSA-gx8x-g87m-h5q6 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 RubyGems dependencies for GHSA-gx8x-g87m-h5q6?
Run the dependency tree command: 'inspect dependencies for 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-gx8x-g87m-h5q6",
  "modified" : "2022-04-11T21:38:11Z",
  "published" : "2022-04-11T21:38:11Z",
  "aliases" : [ ],
  "summary" : "Denial of Service (DoS) in Nokogiri on JRuby",
  "details" : "## Summary\n\nNokogiri `v1.13.4` updates the vendored `org.cyberneko.html` library to `1.9.22.noko2` which addresses [CVE-2022-24839](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv). That CVE is rated 7.5 (High Severity).\n\nSee [GHSA-9849-p7jc-9rmv](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv) for more information.\n\nPlease note that this advisory only applies to the **JRuby** implementation of Nokogiri `< 1.13.4`.\n\n\n## Mitigation\n\nUpgrade to Nokogiri `>= 1.13.4`.\n\n\n## Impact\n\n### [CVE-2022-24839](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv) in nekohtml\n\n- **Severity**: High 7.5\n- **Type**: [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption\n- **Description**: The fork of `org.cyberneko.html` used by Nokogiri (Rubygem) raises a `java.lang.OutOfMemoryError` exception when parsing ill-formed HTML markup.\n- **See also**: [GHSA-9849-p7jc-9rmv](https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv)\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" : "RubyGems",
      "name" : "nokogiri"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.13.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nekohtml/security/advisories/GHSA-9849-p7jc-9rmv"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-gx8x-g87m-h5q6"
  }, {
    "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/nokogiri"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.4"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/ruby-security-ann/c/vX7qSjsvWis/m/TJWN4oOKBwAJ?utm_medium=email&utm_source=footer"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-11T21:38:11Z",
    "nvd_published_at" : null
  }
}