Listen to this Post
How the CVE Works
The vulnerability exists in the `@nestjs/devtools-integration` package, which exposes an unsafe HTTP endpoint (/inspector/graph/interact) during local development. This endpoint accepts JSON input containing a `code` field and executes it in a poorly sandboxed Node.js `vm.runInNewContext` environment. Due to weak sandboxing (similar to the deprecated `safe-eval` library) and missing CORS protections, a malicious website can send crafted POST requests, bypassing security checks. Attackers exploit this by tricking developers into visiting a malicious page, which sends a payload to the local server, leading to arbitrary code execution on the victim’s machine.
DailyCVE Form
Platform: NestJS DevTools
Version: Pre-patch versions
Vulnerability: RCE via sandbox escape
Severity: Critical
Date: 2023-10-XX
Prediction: Patch expected within 7 days
What Undercode Say
Check if vulnerable package is installed
npm list @nestjs/devtools-integration
Exploit simulation (PoC)
curl -X POST -H "Content-Type: text/plain" http://localhost:8000/inspector/graph/interact -d '{"code":"malicious_payload"}'
Mitigation verification
npm update @nestjs/devtools-integration
How Exploit
- Attacker hosts malicious webpage with crafted POST request.
- Victim (developer) visits page while running NestJS dev server.
- Payload executes arbitrary OS commands via sandbox escape.
Protection from this CVE
- Update to patched
@nestjs/devtools-integration. - Disable devtools in production.
- Restrict local dev server access.
Impact
- Full system compromise via RCE.
- Low attack complexity (no user interaction required).
- Targets developers during local development.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
