GHSA-6qc7-jgq7-34rf: Exprss Malicious Package Vulnerability

CRITICAL
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CVSS 9.8
CWE-506
Published
Advisory Summary

GHSA-6qc7-jgq7-34rf is a CRITICAL (CVSS 9.8) malicious package vulnerability (CWE-506: Embedded Malicious Code) affecting Exprss libraries in the npm ecosystem. The issue involves malicious package in exprss. Remediation is available in the latest vendor maintenance releases.

GHSA-6qc7-jgq7-34rf at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-6qc7-jgq7-34rf
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-506: Embedded Malicious Code
Affected Product Exprss
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-6qc7-jgq7-34rf

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

exprss fixed: Latest secure release 
npm install exprss@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 exprss

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-6qc7-jgq7-34rf, inspect your project dependencies using npm:

npm ls exprss

Analyze the terminal output to locate any version of Exprss 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 exprss 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 Exprss, 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 `exprss` typosquatted a popular package of similar name and tracked users who had installed the incorrect package. The package uploaded information to a remote server including: name of the downloaded package, name of the intended package, the Node version and whether the process was running as sudo. There is no further compromise. ## Recommendation Remove the package from your dependencies and always ensure package names are typed correctly upon installation.

GHSA-6qc7-jgq7-34rf Affected Exprss Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
exprss
npm/exprss
npm

References

www.npmjs.com/advisories/851 WEB
https://www.npmjs.com/advisories/851

Frequently Asked Questions

What is GHSA-6qc7-jgq7-34rf?
GHSA-6qc7-jgq7-34rf is a security vulnerability in Exprss involving Malicious Package in exprss under CWE-506: Embedded Malicious Code.
Which Exprss versions are affected?
Affected versions include releases prior to current release patches across affected packages: exprss.
What version fixes GHSA-6qc7-jgq7-34rf?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is exprss affected?
Yes, exprss 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-6qc7-jgq7-34rf?
GHSA-6qc7-jgq7-34rf 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-6qc7-jgq7-34rf?
GHSA-6qc7-jgq7-34rf 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-6qc7-jgq7-34rf?
Run the dependency tree command: 'npm ls exprss'. 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-6qc7-jgq7-34rf",
  "modified" : "2021-10-01T14:02:31Z",
  "published" : "2020-09-02T20:18:18Z",
  "aliases" : [ ],
  "summary" : "Malicious Package in exprss",
  "details" : "All versions of `exprss` typosquatted a popular package of similar name and tracked users who had installed the incorrect package. The package uploaded information to a remote server including: name of the downloaded package, name of the intended package, the Node version and whether the process was running as sudo. There is no further compromise.\n\n\n## Recommendation\n\nRemove the package from your dependencies and always ensure package names are typed correctly upon installation.",
  "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" : "exprss"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/851"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-506" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:38:09Z",
    "nvd_published_at" : null
  }
}