Vulnerabilities in pkg:npm/ansi-html

PACKAGE
Advisory Identifier: GHSA-whgm-jr23-g3j9
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Advisory Summary

CVE-2021-23424 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Ansi html libraries in the npm ecosystem. The issue involves uncontrolled resource consumption in ansi-html. Remediation is available by upgrading affected packages to version 0.0.8.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/ansi-html

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/ansi-html. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-whgm-jr23-g3j9 CVE-2021-23424 HIGH Uncontrolled Resource Consumption in ansi-html

CVE-2021-23424 at a Glance

CVE Identifier CVE-2021-23424
GHSA Identifier GHSA-whgm-jr23-g3j9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Ansi html
Package Ecosystem npm
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-2021-23424

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

ansi-html fixed: 0.0.8 
npm install ansi-html@0.0.8
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 ansi-html

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-23424, inspect your project dependencies using npm:

npm ls ansi-html

Analyze the terminal output to locate any version of Ansi html in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.8), your application is affected.

Note: The npm ls ansi-html 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Ansi html, 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

This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time.

CVE-2021-23424 Affected Ansi html Versions

1 component(s)
Fixed Versions:
0.0.8
Product / Package Ecosystem Affected Versions Fixed Version
ansi-html
npm/ansi-html
npm
< 0.0.8
0.0.8

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ioet/time-tracker-ui/security/advisories/GHSA-4fjc-8q3h-8r69
NVD — CVE-2021-23424 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23424
Ansi html Source Repository REPOSITORY
https://github.com/Tjatse/ansi-html/issues/19
Security Fix Commit FIX COMMIT
https://github.com/Tjatse/ansi-html/commit/8142b25bca3133ea060bcc1889277dc482327a63
Ansi html Source Repository REPOSITORY
https://github.com/Tjatse/ansi-html
snyk.io/vuln/snyk-java-orgw... WEB
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567198
snyk.io/vuln/snyk-js-ansiht... WEB
https://snyk.io/vuln/SNYK-JS-ANSIHTML-1296849

Frequently Asked Questions

What is CVE-2021-23424?
CVE-2021-23424 is a security vulnerability in Ansi html involving Uncontrolled Resource Consumption in ansi-html under CWE-400: Uncontrolled Resource Consumption.
Which Ansi html versions are affected?
Affected versions include releases prior to 0.0.8 across affected packages: ansi-html.
What version fixes CVE-2021-23424?
Upgrading to 0.0.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ansi-html affected?
Yes, ansi-html is affected in releases prior to 0.0.8. Upgrade your dependency to 0.0.8 or later.
What is the CVSS score of CVE-2021-23424?
CVE-2021-23424 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-2021-23424?
CVE-2021-23424 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 npm dependencies for CVE-2021-23424?
Run the dependency tree command: 'npm ls ansi-html'. 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-whgm-jr23-g3j9",
  "modified" : "2021-09-07T21:02:12Z",
  "published" : "2021-09-02T17:15:24Z",
  "aliases" : [ "CVE-2021-23424" ],
  "summary" : "Uncontrolled Resource Consumption in ansi-html",
  "details" : "This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time.",
  "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" : "npm",
      "name" : "ansi-html"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ioet/time-tracker-ui/security/advisories/GHSA-4fjc-8q3h-8r69"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-23424"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Tjatse/ansi-html/issues/19"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Tjatse/ansi-html/commit/8142b25bca3133ea060bcc1889277dc482327a63"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Tjatse/ansi-html"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567198"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-ANSIHTML-1296849"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-26T14:50:45Z",
    "nvd_published_at" : "2021-08-18T17:15:00Z"
  }
}