CVE-2020-7771: Asciitable.js Prototype Pollution Vulnerability

CRITICAL
Advisory Identifier: GHSA-5pxj-mhwj-x5gv
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CVSS 9.8
CWE-400
Published
Advisory Summary

CVE-2020-7771 is a CRITICAL (CVSS 9.8) prototype pollution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Asciitable.js libraries in the npm ecosystem. The issue involves prototype pollution in asciitable.js. Remediation is available by upgrading affected packages to version 1.0.3.

CVE-2020-7771 at a Glance

CVE Identifier CVE-2020-7771
GHSA Identifier GHSA-5pxj-mhwj-x5gv
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Asciitable.js
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-7771

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

asciitable.js fixed: 1.0.3 
npm install asciitable.js@1.0.3
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 asciitable.js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-7771, inspect your project dependencies using npm:

npm ls asciitable.js

Analyze the terminal output to locate any version of Asciitable.js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.3), your application is affected.

Note: The npm ls asciitable.js 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 Asciitable.js, 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

The package asciitable.js before 1.0.3 is vulnerable to Prototype Pollution via the main function. ### PoC ```js var a = require("asciitable.js"); var b = JSON.parse('{"__proto__":{"test":123}}'); a({},b); console.log({}.test) ```

CVE-2020-7771 Affected Asciitable.js Versions

1 component(s)
Fixed Versions:
1.0.3
Product / Package Ecosystem Affected Versions Fixed Version
asciitable.js
npm/asciitable.js
npm
< 1.0.3
1.0.3

References

NVD — CVE-2020-7771 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7771
Asciitable.js Source Repository REPOSITORY
https://github.com/victornpb/asciitable.js/pull/1
Security Fix Commit FIX COMMIT
https://github.com/victornpb/asciitable.js/commit/8db8fc5ffa7a2a6e8596709d99b200afb53f40ab
Asciitable.js Source Repository REPOSITORY
https://github.com/victornpb/asciitable.js
snyk.io/vuln/snyk-js-asciit... WEB
https://snyk.io/vuln/SNYK-JS-ASCIITABLEJS-1039799

Frequently Asked Questions

What is CVE-2020-7771?
CVE-2020-7771 is a security vulnerability in Asciitable.js involving Prototype Pollution in asciitable.js under CWE-400: Uncontrolled Resource Consumption.
Which Asciitable.js versions are affected?
Affected versions include releases prior to 1.0.3 across affected packages: asciitable.js.
What version fixes CVE-2020-7771?
Upgrading to 1.0.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is asciitable.js affected?
Yes, asciitable.js is affected in releases prior to 1.0.3. Upgrade your dependency to 1.0.3 or later.
What is the CVSS score of CVE-2020-7771?
CVE-2020-7771 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-7771?
CVE-2020-7771 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-2020-7771?
Run the dependency tree command: 'npm ls asciitable.js'. 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-5pxj-mhwj-x5gv",
  "modified" : "2023-09-11T18:53:26Z",
  "published" : "2021-04-13T15:24:59Z",
  "aliases" : [ "CVE-2020-7771" ],
  "summary" : "Prototype Pollution in asciitable.js",
  "details" : "The package asciitable.js before 1.0.3 is vulnerable to Prototype Pollution via the main function.\n\n### PoC\n```js\nvar a = require(\"asciitable.js\"); \nvar b = JSON.parse('{\"__proto__\":{\"test\":123}}'); \na({},b); \nconsole.log({}.test)\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "asciitable.js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7771"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/victornpb/asciitable.js/pull/1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/victornpb/asciitable.js/commit/8db8fc5ffa7a2a6e8596709d99b200afb53f40ab"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/victornpb/asciitable.js"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-ASCIITABLEJS-1039799"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-06T23:32:45Z",
    "nvd_published_at" : "2021-01-04T12:15:00Z"
  }
}