GHSA-x9hc-rw35-f44h: Static eval Sandbox Breakout / Arbitrary Code Vulnerability

HIGH
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CVSS 7.3
CWE-94
Published
Advisory Summary

GHSA-x9hc-rw35-f44h is a HIGH (CVSS 7.3) sandbox breakout / arbitrary code vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Static eval libraries in the npm ecosystem. The issue involves sandbox breakout / arbitrary code execution in static-eval. Remediation is available by upgrading affected packages to version 2.0.2.

GHSA-x9hc-rw35-f44h at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-x9hc-rw35-f44h
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Static eval
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 GHSA-x9hc-rw35-f44h

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

static-eval fixed: 2.0.2 
npm install static-eval@2.0.2
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 static-eval

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-x9hc-rw35-f44h, inspect your project dependencies using npm:

npm ls static-eval

Analyze the terminal output to locate any version of Static eval in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.2), your application is affected.

Note: The npm ls static-eval 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Static eval, 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

Versions of `static-eval`prior to 2.0.2 pass untrusted user input directly to the global function constructor, resulting in an arbitrary code execution vulnerability when user input is parsed via the package. ## Proof of concept ``` var evaluate = require('static-eval'); var parse = require('esprima').parse; var src = process.argv[2]; var payload = '(function({x}){return x.constructor})({x:"".sub})("console.log(process.env)")()' var ast = parse(payload).body[0].expression; console.log(evaluate(ast, {x:1})); ``` ## Recommendation Upgrade to version 2.0.2 or later.

GHSA-x9hc-rw35-f44h Affected Static eval Versions

1 component(s)
Fixed Versions:
2.0.2
Product / Package Ecosystem Affected Versions Fixed Version
static-eval
npm/static-eval
npm
< 2.0.2
2.0.2

References

snyk.io/vuln/snyk-js-static... PACKAGE
https://snyk.io/vuln/SNYK-JS-STATICEVAL-173693
www.npmjs.com/advisories/758 WEB
https://www.npmjs.com/advisories/758

Frequently Asked Questions

What is GHSA-x9hc-rw35-f44h?
GHSA-x9hc-rw35-f44h is a security vulnerability in Static eval involving Sandbox Breakout / Arbitrary Code Execution in static-eval under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Static eval versions are affected?
Affected versions include releases prior to 2.0.2 across affected packages: static-eval.
What version fixes GHSA-x9hc-rw35-f44h?
Upgrading to 2.0.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is static-eval affected?
Yes, static-eval is affected in releases prior to 2.0.2. Upgrade your dependency to 2.0.2 or later.
What is the CVSS score of GHSA-x9hc-rw35-f44h?
GHSA-x9hc-rw35-f44h 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 GHSA-x9hc-rw35-f44h?
GHSA-x9hc-rw35-f44h is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check npm dependencies for GHSA-x9hc-rw35-f44h?
Run the dependency tree command: 'npm ls static-eval'. 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-x9hc-rw35-f44h",
  "modified" : "2021-09-27T13:40:52Z",
  "published" : "2020-09-02T15:46:03Z",
  "aliases" : [ ],
  "summary" : "Sandbox Breakout / Arbitrary Code Execution in static-eval",
  "details" : "Versions of `static-eval`prior to 2.0.2 pass untrusted user input directly to the global function constructor, resulting in an arbitrary code execution vulnerability when user input is parsed via the package.\n\n## Proof of concept\n```\nvar evaluate = require('static-eval');\nvar parse = require('esprima').parse;\n\nvar src = process.argv[2];\nvar payload = '(function({x}){return x.constructor})({x:\"\".sub})(\"console.log(process.env)\")()'\nvar ast = parse(payload).body[0].expression;\nconsole.log(evaluate(ast, {x:1}));\n```\n\n\n## Recommendation\n\nUpgrade to version 2.0.2 or later.",
  "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" : "static-eval"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.0.1"
    }
  } ],
  "references" : [ {
    "type" : "PACKAGE",
    "url" : "https://snyk.io/vuln/SNYK-JS-STATICEVAL-173693"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/758"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:34:42Z",
    "nvd_published_at" : null
  }
}