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Security audit

Nebula Claw Developer

Security checks across malware telemetry and agentic risk

Overview

This skill has a clear disposable-VM purpose, but it gives agents infrastructure-changing power with weakly documented authentication, credential handling, deletion safeguards, and privileged setup boundaries.

Install only in a controlled OpenNebula environment after confirming the API is authenticated, bound to localhost or a protected network, uses least-privilege credentials, avoids plaintext password passing, and requires careful target verification before any hard VM deletion.

SkillSpector

By NVIDIA
Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Tool MisuseTool Parameter Abuse, Chaining Abuse, Unsafe Defaults
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
Findings (7)

Lp3

Medium
Category
MCP Least Privilege
Confidence
92% confidence
Finding
The skill advertises shell-capable bundled resources (`scripts/vm_api.sh`) and operational behavior that can provision and destroy infrastructure, but it does not declare any explicit permissions. This creates a transparency and governance gap: callers may invoke a skill with infrastructure-changing capabilities without an auditable permission boundary, increasing the chance of unintended execution or misuse.

Intent-Code Divergence

Medium
Confidence
86% confidence
Finding
The document states that actions use a dedicated non-admin user, but the examples actually run the local CLI as `oneadmin` and then pass restricted-user credentials to the API-facing commands. This can mislead deployers about the true trust boundary and may normalize running the service through a privileged local account, increasing the chance of privilege misuse or accidental expansion beyond the intended restricted control plane.

Missing User Warnings

Medium
Confidence
97% confidence
Finding
The setup instructions embed a real-looking password directly in commands and examples, which encourages credential reuse and exposes secrets via shell history, process listings, logs, screenshots, and copied documentation. In a control-plane skill that provisions and terminates VMs, leaked credentials could allow unauthorized VM creation, inspection, or destruction within the allowed scope.

Sudo/Root Execution

Medium
Category
Privilege Escalation
Content
- Keep the curated `templates` allowlist small and documented with descriptions.
- Add TTL-based cleanup for disposable VMs.
- Restrict bind address and network exposure according to the deployment.
- Ensure the service account has passwordless sudo for the exact `one*` binaries used by the API, otherwise systemd runs can hang on sudo prompts.
Confidence
93% confidence
Finding
sudo

Sudo/Root Execution

Medium
Category
Privilege Escalation
Content
- Keep the curated `templates` allowlist small and documented with descriptions.
- Add TTL-based cleanup for disposable VMs.
- Restrict bind address and network exposure according to the deployment.
- Ensure the service account has passwordless sudo for the exact `one*` binaries used by the API, otherwise systemd runs can hang on sudo prompts.
Confidence
93% confidence
Finding
sudo

Tool Parameter Abuse

High
Category
Tool Misuse
Content
- `GET /health`
- `GET /vms`
- `POST /vms`
- `DELETE /vms/<vm_id_or_name>`

Prefer readable VM and template names over numeric identifiers whenever possible.
Confidence
88% confidence
Finding
DELETE /vms/<vm_id_or_name>`

Tool Parameter Abuse

High
Category
Tool Misuse
Content
Delete by name when possible:

```text
DELETE /vms/test-nebula-api-2026-04-10
```

## Expected environment inputs
Confidence
85% confidence
Finding
DELETE /vms/test-nebula-api-2026-04-10

VirusTotal

64/64 vendors flagged this skill as clean.

View on VirusTotal

Static analysis

No suspicious patterns detected.