CVE-2021-4245: Rfc6902 Npm Package Rfc6902 Vulnerable To Vulnerability

CRITICAL
Advisory Identifier: GHSA-p495-jxh2-wrfg
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CVSS 9.8
CWE-1321 CWE-74
Published
Advisory Summary

CVE-2021-4245 is a CRITICAL (CVSS 9.8) npm package rfc6902 vulnerable to vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Rfc6902 libraries in the npm ecosystem. The issue involves npm package rfc6902 vulnerable to prototype pollution. Remediation is available by upgrading affected packages to version 5.0.0.

CVE-2021-4245 at a Glance

CVE Identifier CVE-2021-4245
GHSA Identifier GHSA-p495-jxh2-wrfg
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Rfc6902
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-2021-4245

To remediate this vulnerability, upgrade all affected Rfc6902 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

rfc6902 fixed: 5.0.0 
npm install rfc6902@5.0.0
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 rfc6902

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2021-4245, inspect your project dependencies using npm:

npm ls rfc6902

Analyze the terminal output to locate any version of Rfc6902 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.0.0), your application is affected.

Note: The npm ls rfc6902 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 Rfc6902, 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

A vulnerability classified as problematic has been found in chbrown rfc6902. This affects an unknown part of the file pointer.ts. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The exploit has been disclosed to the public and may be used. The name of the patch is c006ce9faa43d31edb34924f1df7b79c137096cf. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-215883.

CVE-2021-4245 Affected Rfc6902 Versions

1 component(s)
Fixed Versions:
5.0.0
Product / Package Ecosystem Affected Versions Fixed Version
rfc6902
npm/rfc6902
npm
< 5.0.0
5.0.0

References

NVD — CVE-2021-4245 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4245
Rfc6902 Source Repository REPOSITORY
https://github.com/chbrown/rfc6902/issues/84
Rfc6902 Source Repository REPOSITORY
https://github.com/chbrown/rfc6902/pull/76
Security Fix Commit FIX COMMIT
https://github.com/chbrown/rfc6902/commit/c006ce9faa43d31edb34924f1df7b79c137096cf
Rfc6902 Source Repository REPOSITORY
https://github.com/chbrown/rfc6902
vuldb.com/ WEB
https://vuldb.com/?id.215883

Frequently Asked Questions

What is CVE-2021-4245?
CVE-2021-4245 is a security vulnerability in Rfc6902 involving npm package rfc6902 vulnerable to Prototype Pollution under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Rfc6902 versions are affected?
Affected versions include releases prior to 5.0.0 across affected packages: rfc6902.
What version fixes CVE-2021-4245?
Upgrading to 5.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rfc6902 affected?
Yes, rfc6902 is affected in releases prior to 5.0.0. Upgrade your dependency to 5.0.0 or later.
What is the CVSS score of CVE-2021-4245?
CVE-2021-4245 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-2021-4245?
CVE-2021-4245 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-2021-4245?
Run the dependency tree command: 'npm ls rfc6902'. 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-p495-jxh2-wrfg",
  "modified" : "2022-12-20T18:53:51Z",
  "published" : "2022-12-15T21:30:28Z",
  "aliases" : [ "CVE-2021-4245" ],
  "summary" : "npm package rfc6902 vulnerable to Prototype Pollution",
  "details" : "A vulnerability classified as problematic has been found in chbrown rfc6902. This affects an unknown part of the file pointer.ts. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The exploit has been disclosed to the public and may be used. The name of the patch is c006ce9faa43d31edb34924f1df7b79c137096cf. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-215883.",
  "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" : "rfc6902"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-4245"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chbrown/rfc6902/issues/84"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chbrown/rfc6902/pull/76"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chbrown/rfc6902/commit/c006ce9faa43d31edb34924f1df7b79c137096cf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chbrown/rfc6902"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?id.215883"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321", "CWE-74" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-15T23:29:47Z",
    "nvd_published_at" : "2022-12-15T20:15:00Z"
  }
}