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Security audit

Google Address Validation

Security checks for vulnerabilities and agentic risk

Overview

The address-validation workflow is reasonable, but its setup can execute unchecked remote code and introduce undisclosed changes to other agent skills.

Review setup before installing. Use a verified, fixed CLI release and disable startup skill synchronization before its first invocation using OO_SKILLS_SYNC_DISABLED=1, as documented in the [CLI controls](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md#environment-variables). Addresses pass through OOMOL, and the actual remote installers and released binary remain unverified.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The only supplied command executes an installer from a non-Google domain, without any demonstrated connection to address validation. This is an undeclared installation capability rather than an established supporting implementation detail. The remote script's contents and any further effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup instructions pipe a remotely fetched, mutable script directly into Bash without verifying a pinned version or integrity; the PowerShell alternative has the same problem. If the distribution endpoint or its publishing infrastructure is compromised, following these instructions could execute attacker-controlled code with the agent process's privileges and expose local files or credentials. The legitimate dependency-installation context and missing-command prerequisite reduce suspicion of malicious intent but do not remove the supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 56)May include surrounding context.

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 77)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