# GHSA-7r5f-7qr4-pf6q: Sandbox Breakout / Arbitrary Code Execution in notevil

> Attackers can escape the sandbox and execute arbitrary code by accessing the Function constructor, requiring an upgrade to the notevil library.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Sep 2020

## What is GHSA-7r5f-7qr4-pf6q?

GHSA-7r5f-7qr4-pf6q is a code injection vulnerability in notevil, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Versions of `notevil` prior to 1.3.2 are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to prevent access to the `Function` constructor by not checking the return values of function calls. This allows attackers to access the Function prototype's constructor leading to the Sandbox Escape. An example payload is:  
```
var safeEval = require('notevil')
var input = "" + 
"function fn() {};" + 
"var constructorProperty = Object.getOwnPropertyDescriptors(fn.__proto__).constructor;" + 
"var properties = Object.values(constructorProperty);" + 
"properties.pop();" + 
"properties.pop();" + 
"properties.pop();" + 
"var Function = properties.pop();" + 
"(Function('return this'))()"; 
safeEval(input)```

## Recommendation

Upgrade to version 1.3.2 or later.

## Which versions are affected by GHSA-7r5f-7qr4-pf6q?

2 open source packages ship an affected version, including notevil.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `notevil` | npm | All versions | 1.3.2 |
| `notevil` | npm | All versions | 1.3.2 |

## How do I fix GHSA-7r5f-7qr4-pf6q?

Upgrade notevil to 1.3.2 or later.

## Is GHSA-7r5f-7qr4-pf6q being exploited?

There is no known exploitation of GHSA-7r5f-7qr4-pf6q in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-7r5f-7qr4-pf6q and fix it if it is affected.

What it is: GHSA-7r5f-7qr4-pf6q is a code injection vulnerability in notevil, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-7r5f-7qr4-pf6q in the wild and no public exploit code.

Affected packages and fixed versions:
- notevil (npm): affected all versions; fixed in 1.3.2
- notevil (npm): affected all versions; fixed in 1.3.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/GHSA-7r5f-7qr4-pf6q/ (Markdown: https://insights.sbomify.com/GHSA-7r5f-7qr4-pf6q/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-7r5f-7qr4-pf6q

---
From sbomify Insights: https://insights.sbomify.com/GHSA-7r5f-7qr4-pf6q/
Summaries are generated and may contain mistakes; the official description above is the record.