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Security audit

Starton

Security checks for vulnerabilities and agentic risk

Overview

Starton operations have clear approval rules, but setup executes unverified remote code and leaves broader agent-skill changes undisclosed.

Review the CLI setup before enabling this skill. Prefer a separately verified, pinned installation. Current publisher documentation provides OO_SKILLS_SYNC_DISABLED=1 to prevent startup skill synchronization; configure it before invoking oo if you want to avoid additional agent-skill changes. Connect only the intended Starton account, consider OOMOL's intermediary access, and retain the required write/delete confirmations. The remote installer and connector implementation remain outside the inspected package.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command contains no Starton operations and instead executes an installer from cli.oomol.com. No connection is established between this installer and the declared Starton functionality, making it a materially different capability rather than an evident supporting implementation detail. The downloaded script's contents and further effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
88% confidence
Finding

The supplied code only initiates CLI login and contains no Starton-specific operations or configuration linking that login to Starton. Authentication could support the declared purpose, but the provided chunk shows only authentication as its behavior, not a Starton integration.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable remote script directly into Bash executes its contents without prior integrity or authenticity verification beyond HTTPS. A compromised distribution endpoint could therefore execute arbitrary code with the agent's permissions; this is the same underlying installation risk identified by SQP-2, not an independent attack path.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

The setup workflow executes remotely downloaded installation scripts without warning the user or requiring approval.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback setup directs execution of downloaded shell or PowerShell code without an explicit installation approval gate or artifact verification. If an agent executes it and the installer source is compromised, the code runs with the agent's local privileges and could access files or credentials; the missing-CLI condition limits exposure but does not remove the risk.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 80)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources