CVE-2021-43306: Jquery validation Denial of Service Vulnerability

LOW
Advisory Identifier: GHSA-j9m2-h2pv-wvph
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CWE-1333
Published
Advisory Summary

CVE-2021-43306 is a LOW denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Jquery validation libraries in the npm ecosystem. The issue involves regular expression denial of service in jquery-validation. Remediation is available by upgrading affected packages to version 1.19.4.

CVE-2021-43306 at a Glance

CVE Identifier CVE-2021-43306
GHSA Identifier GHSA-j9m2-h2pv-wvph
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Jquery validation
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2021-43306

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

jquery-validation fixed: 1.19.4 
npm install jquery-validation@1.19.4
Verify Direct and Transitive Dependencies

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

npm ls jquery-validation

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-43306, inspect your project dependencies using npm:

npm ls jquery-validation

Analyze the terminal output to locate any version of Jquery validation in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.19.4), your application is affected.

Note: The npm ls jquery-validation command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Jquery validation, 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

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method

CVE-2021-43306 Affected Jquery validation Versions

1 component(s)
Fixed Versions:
1.19.4
Product / Package Ecosystem Affected Versions Fixed Version
jquery-validation
npm/jquery-validation
npm
< 1.19.4
1.19.4

References

NVD — CVE-2021-43306 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43306
Jquery validation Source Repository REPOSITORY
https://github.com/jquery-validation/jquery-validation/pull/2428
Security Fix Commit FIX COMMIT
https://github.com/jquery-validation/jquery-validation/commit/69cb17ed774b427f7e2ffcdf197968231725c30e
Jquery validation Source Repository REPOSITORY
https://github.com/jquery-validation/jquery-validation
research.jfrog.com/vulnerabilities/jqu... WEB
https://research.jfrog.com/vulnerabilities/jquery-validation-redos-xray-211348

Frequently Asked Questions

What is CVE-2021-43306?
CVE-2021-43306 is a security vulnerability in Jquery validation involving Regular expression denial of service in jquery-validation under CWE-1333: Inefficient Regular Expression Complexity.
Which Jquery validation versions are affected?
Affected versions include releases prior to 1.19.4 across affected packages: jquery-validation.
What version fixes CVE-2021-43306?
Upgrading to 1.19.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jquery-validation affected?
Yes, jquery-validation is affected in releases prior to 1.19.4. Upgrade your dependency to 1.19.4 or later.
What CWE is associated with CVE-2021-43306?
CVE-2021-43306 is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check npm dependencies for CVE-2021-43306?
Run the dependency tree command: 'npm ls jquery-validation'. 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-j9m2-h2pv-wvph",
  "modified" : "2024-11-12T14:55:23Z",
  "published" : "2022-06-03T00:00:59Z",
  "aliases" : [ "CVE-2021-43306" ],
  "summary" : "Regular expression denial of service in jquery-validation",
  "details" : "An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "jquery-validation"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.19.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-43306"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jquery-validation/jquery-validation/pull/2428"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jquery-validation/jquery-validation/commit/69cb17ed774b427f7e2ffcdf197968231725c30e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jquery-validation/jquery-validation"
  }, {
    "type" : "WEB",
    "url" : "https://research.jfrog.com/vulnerabilities/jquery-validation-redos-xray-211348"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-03T22:26:59Z",
    "nvd_published_at" : "2022-06-02T14:15:00Z"
  }
}