GHSA-76qf-6mvw-c5hm: Js base64 int Malicious Package Vulnerability

CRITICAL
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CVSS 9.8
CWE-506
Published
Advisory Summary

GHSA-76qf-6mvw-c5hm is a CRITICAL (CVSS 9.8) malicious package vulnerability (CWE-506: Embedded Malicious Code) affecting Js base64 int libraries in the npm ecosystem. The issue involves malicious package in js-base64-int. Remediation is available in the latest vendor maintenance releases.

GHSA-76qf-6mvw-c5hm at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-76qf-6mvw-c5hm
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-506: Embedded Malicious Code
Affected Product Js base64 int
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 GHSA-76qf-6mvw-c5hm

To remediate this vulnerability, upgrade all affected Js base64 int dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

js-base64-int fixed: Latest secure release 
npm install js-base64-int@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 js-base64-int

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-76qf-6mvw-c5hm, inspect your project dependencies using npm:

npm ls js-base64-int

Analyze the terminal output to locate any version of Js base64 int 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 js-base64-int 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-506: Embedded Malicious Code, where the product contains code that appears to be malicious in nature. In Js base64 int, 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 package contained malicious code. The package uploaded system information such as OS and hostname to a remote server. ## Recommendation Remove the package from your environment. There are no indications of further compromise.

GHSA-76qf-6mvw-c5hm Affected Js base64 int Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
js-base64-int
npm/js-base64-int
npm
≥ 0.0.0

References

www.npmjs.com/advisories/1128 WEB
https://www.npmjs.com/advisories/1128

Frequently Asked Questions

What is GHSA-76qf-6mvw-c5hm?
GHSA-76qf-6mvw-c5hm is a security vulnerability in Js base64 int involving Malicious Package in js-base64-int under CWE-506: Embedded Malicious Code.
Which Js base64 int versions are affected?
Affected versions include releases prior to current release patches across affected packages: js-base64-int.
What version fixes GHSA-76qf-6mvw-c5hm?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is js-base64-int affected?
Yes, js-base64-int is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-76qf-6mvw-c5hm?
GHSA-76qf-6mvw-c5hm 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 GHSA-76qf-6mvw-c5hm?
GHSA-76qf-6mvw-c5hm is classified under CWE-506: Embedded Malicious Code (The product contains code that appears to be malicious in nature.).
How can I check npm dependencies for GHSA-76qf-6mvw-c5hm?
Run the dependency tree command: 'npm ls js-base64-int'. 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-76qf-6mvw-c5hm",
  "modified" : "2021-09-30T20:16:45Z",
  "published" : "2020-09-03T19:45:42Z",
  "aliases" : [ ],
  "summary" : "Malicious Package in js-base64-int",
  "details" : "This package contained malicious code. The package uploaded system information such as OS and hostname to a remote server.\n\n\n## Recommendation\n\nRemove the package from your environment. There are no indications of further compromise.",
  "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" : "js-base64-int"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/1128"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-506" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:48:16Z",
    "nvd_published_at" : null
  }
}