CVE-2021-23402: Record like deep assign Prototype Pollution Vulnerability

HIGH
Advisory Identifier: GHSA-7qm6-9v49-38m9
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CVSS 7.3
CWE-1321 CWE-915
Published
Advisory Summary

CVE-2021-23402 is a HIGH (CVSS 7.3) prototype pollution vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Record like deep assign libraries in the npm ecosystem. The issue involves prototype pollution in record-like-deep-assign. Remediation is available in the latest vendor maintenance releases.

CVE-2021-23402 at a Glance

CVE Identifier CVE-2021-23402
GHSA Identifier GHSA-7qm6-9v49-38m9
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Record like deep assign
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.3

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:L/I:L/A:L).

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 Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2021-23402

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

record-like-deep-assign fixed: Latest secure release 
npm install record-like-deep-assign@Latest secure release
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 record-like-deep-assign

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-23402, inspect your project dependencies using npm:

npm ls record-like-deep-assign

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

Note: The npm ls record-like-deep-assign 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-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where the product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. In Record like deep assign, 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

All versions of package record-like-deep-assign are vulnerable to Prototype Pollution via the main functionality. ### PoC ```js const deepAssign = require('record-like-deep-assign'); let obj = {}; console.log("Before being polluted: " + obj.polluted); EVIL_JSON = JSON.parse('{"__proto__":{"polluted":true}}'); deepAssign({}, EVIL_JSON); console.log("After being polluted: " + obj.polluted); ```

CVE-2021-23402 Affected Record like deep assign Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
record-like-deep-assign
npm/record-like-deep-assign
npm
≤ 1.0.1

References

NVD — CVE-2021-23402 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23402
Record like deep assign Source Repository REPOSITORY
https://github.com/kripod/record-like-deep-assign
Record like deep assign Source Repository REPOSITORY
https://github.com/kripod/record-like-deep-assign/blob/v1.0.1/src/mod.ts%23L17-L35
snyk.io/vuln/snyk-js-record... WEB
https://snyk.io/vuln/SNYK-JS-RECORDLIKEDEEPASSIGN-1311024

Frequently Asked Questions

What is CVE-2021-23402?
CVE-2021-23402 is a security vulnerability in Record like deep assign involving Prototype Pollution in record-like-deep-assign under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Record like deep assign versions are affected?
Affected versions include releases prior to current release patches across affected packages: record-like-deep-assign.
What version fixes CVE-2021-23402?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is record-like-deep-assign affected?
Yes, record-like-deep-assign is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-23402?
CVE-2021-23402 has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2021-23402?
CVE-2021-23402 is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.).
How can I check npm dependencies for CVE-2021-23402?
Run the dependency tree command: 'npm ls record-like-deep-assign'. 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-7qm6-9v49-38m9",
  "modified" : "2023-09-11T18:40:49Z",
  "published" : "2021-12-10T18:55:39Z",
  "aliases" : [ "CVE-2021-23402" ],
  "summary" : "Prototype Pollution in record-like-deep-assign",
  "details" : "All versions of package record-like-deep-assign are vulnerable to Prototype Pollution via the main functionality.\n\n### PoC\n```js\nconst deepAssign = require('record-like-deep-assign');\nlet obj = {};\nconsole.log(\"Before being polluted: \" + obj.polluted);\nEVIL_JSON = JSON.parse('{\"__proto__\":{\"polluted\":true}}');\ndeepAssign({}, EVIL_JSON);\nconsole.log(\"After being polluted: \" + obj.polluted);\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "record-like-deep-assign"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-23402"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kripod/record-like-deep-assign"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kripod/record-like-deep-assign/blob/v1.0.1/src/mod.ts%23L17-L35"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-RECORDLIKEDEEPASSIGN-1311024"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321", "CWE-915" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-06T14:32:33Z",
    "nvd_published_at" : "2021-07-02T16:15:00Z"
  }
}