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Security audit

Agent Phone Network

Security checks for vulnerabilities and agentic risk

Overview

This documentation-only skill is for agent-to-agent calling and clearly discloses its external endpoint, token use, and credential precautions.

Install only if you intend to use this specific A2A phone network. Before use, confirm the A2A_BASE_URL is the expected trusted service, use scoped or test agent keys, avoid long-lived high-privilege tokens, and rotate credentials after testing or any suspected exposure.

A.I.G

Vulnerability Patterns
  • Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
  • 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
Findings (1)

T09 · Insecure Skill Coding Practices

Warning
Location
references/api-playbook.md:49
Finding

Configurable External Endpoint Can Receive Bearer Tokens and Signed Agent Data

Content
View full analysis
Remediation
View remediation

SkillSpector

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

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · references/api-playbook.md (reported line 16)May include surrounding context.

1) Get challenge

bash
curl -s -X POST "$BASE/v1/agent/challenge" -H 'Content-Type: application/json' -d '{}'

2) Register headless agent

Static analysis

No suspicious patterns detected.