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Security audit

Freight Broker — Carrier Vetting Checklist

Security checks for vulnerabilities and agentic risk

Overview

This skill provides a carrier-vetting checklist without granting authority to book freight, modify records, or access private accounts.

Use this as a decision aid and verify carrier records through current official sources and the insurer. Keep booking decisions under your control. The referenced parent checklist and monitoring agents are not included in this package.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (1)

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% 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 22)May include surrounding context.

md
- **Insurance**: cargo + auto liability on file, adequate limits, broker named as certificate holder, verified with the insurer (not just a PDF).
- **Safety**: FMCSA safety rating / SMS BASIC scores; out-of-service history.
- **Identity match**: phone/email/address match FMCSA record; watch VoIP + gmail + brand-new authority (fraud signals).
- **Double-brokering guard**: confirm the carrier hauling = the carrier booked; no re-brokering without consent.

## Worked example
Carrier quotes 30% under market, authority active 3 weeks, gmail contact, address = a UPS store.