GHSA-7xfq-xh6v-4mrm: Json serializer Malicious Package Vulnerability

CRITICAL
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CVSS 9.8
CWE-506
Published
Advisory Summary

GHSA-7xfq-xh6v-4mrm is a CRITICAL (CVSS 9.8) malicious package vulnerability (CWE-506: Embedded Malicious Code) affecting Json serializer libraries in the npm ecosystem. The issue involves malicious package in json-serializer. Remediation is available by upgrading affected packages to version 2.0.11.

GHSA-7xfq-xh6v-4mrm at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-7xfq-xh6v-4mrm
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-506: Embedded Malicious Code
Affected Product Json serializer
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-7xfq-xh6v-4mrm

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

json-serializer fixed: 2.0.11 
npm install json-serializer@2.0.11
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 json-serializer

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-7xfq-xh6v-4mrm, inspect your project dependencies using npm:

npm ls json-serializer

Analyze the terminal output to locate any version of Json serializer in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.11), your application is affected.

Note: The npm ls json-serializer 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 Json serializer, 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

Version 2.0.10 of `json-serializer` contained malicious code. The code when executed in the browser would enumerate password, cvc, cardnumber fields from forms and send the extracted values to `https://js-metrics.com/minjs.php?pl=` ## Recommendation If version 2.0.10 of this module is found installed you will want to replace it with a version before or after 2.0.10. In addition to replacing the installed module, you will also want to evaluate your application to determine whether or not user data was compromised.

GHSA-7xfq-xh6v-4mrm Affected Json serializer Versions

1 component(s)
Fixed Versions:
2.0.11
Product / Package Ecosystem Affected Versions Fixed Version
json-serializer
npm/json-serializer
npm
≥ 2.0.10
< 2.0.11
All 1 versions
2.0.10
2.0.11

References

www.npmjs.com/advisories/630 WEB
https://www.npmjs.com/advisories/630

Frequently Asked Questions

What is GHSA-7xfq-xh6v-4mrm?
GHSA-7xfq-xh6v-4mrm is a security vulnerability in Json serializer involving Malicious Package in json-serializer under CWE-506: Embedded Malicious Code.
Which Json serializer versions are affected?
Affected versions include releases prior to 2.0.11 across affected packages: json-serializer.
What version fixes GHSA-7xfq-xh6v-4mrm?
Upgrading to 2.0.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is json-serializer affected?
Yes, json-serializer is affected in releases prior to 2.0.11. Upgrade your dependency to 2.0.11 or later.
What is the CVSS score of GHSA-7xfq-xh6v-4mrm?
GHSA-7xfq-xh6v-4mrm 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-7xfq-xh6v-4mrm?
GHSA-7xfq-xh6v-4mrm 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-7xfq-xh6v-4mrm?
Run the dependency tree command: 'npm ls json-serializer'. 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-7xfq-xh6v-4mrm",
  "modified" : "2021-10-01T13:10:41Z",
  "published" : "2020-09-01T20:27:53Z",
  "aliases" : [ ],
  "summary" : "Malicious Package in json-serializer",
  "details" : "Version 2.0.10 of `json-serializer` contained malicious code. The code when executed in the browser would enumerate password, cvc, cardnumber fields from forms and send the extracted values to `https://js-metrics.com/minjs.php?pl=`\n\n\n\n## Recommendation\n\nIf version 2.0.10 of this module is found installed you will want to replace it with a version before or after 2.0.10. In addition to replacing the installed module, you will also want to evaluate your application to determine whether or not user data was compromised.",
  "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" : "json-serializer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.10"
      }, {
        "fixed" : "2.0.11"
      } ]
    } ],
    "versions" : [ "2.0.10" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/630"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-506" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:30:33Z",
    "nvd_published_at" : null
  }
}