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Security audit

NFC Tools

Security checks for vulnerabilities and agentic risk

Overview

This skill is a coherent NFC helper that documents cautious tag reading and writing with explicit confirmation gates for destructive actions.

Install only if you need local NFC reader support. Review the sudo setup commands before running them, and only allow write, erase, or format operations after verifying the target tag, payload, and required confirmation text.

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
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (6)

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · README.md (reported line 21)May include surrounding context.

Debian/Ubuntu

sh
sudo apt update
sudo apt install libnfc-bin libnfc-utils libnfc-examples

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · README.md (reported line 22)May include surrounding context.

Debian/Ubuntu

sh
sudo apt update
sudo apt install libnfc-bin libnfc-utils libnfc-examples

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · README.md (reported line 27)May include surrounding context.

Debian/Ubuntu

sh
sudo apt update
sudo apt install libnfc-bin libnfc-utils libnfc-examples

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · README.md (reported line 28)May include surrounding context.

Debian/Ubuntu

sh
sudo apt update
sudo apt install libnfc-bin libnfc-utils libnfc-examples

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · README.md (reported line 29)May include surrounding context.

Debian/Ubuntu

sh
sudo apt update
sudo apt install libnfc-bin libnfc-utils libnfc-examples

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · README.md (reported line 30)May include surrounding context.

Debian/Ubuntu

sh
sudo apt update
sudo apt install libnfc-bin libnfc-utils libnfc-examples