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Security audit

jackson-security

Security checks for vulnerabilities and agentic risk

Overview

This skill is a Markdown-only security reference about Jackson deserialization risks, and the dangerous-looking command is only an example payload.

This appears safe to install as reference material. Users should treat the payload snippets as examples for threat modeling and testing in controlled environments, not as commands or application code to execute.

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
  • Tool MisuseTool Parameter Abuse, Chaining Abuse, Unsafe Defaults
  • 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 (2)

Tool Parameter Abuse

High
Category
Tool Misuse
Content
{
      "@class": "com.attacker.MaliciousClass",
      "command": "rm -rf /"
    }

Jackson will attempt to instantiate whatever class is named. If the classpath contains exploitable "gadget" classes, arbitrary code execution may occur during deserialization—before your code ever runs.
Confidence
90% confidence
Finding
Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).

Tool Parameter Abuse

High
Category
Tool Misuse
Content
{
      "@class": "com.attacker.MaliciousClass",
      "command": "rm -rf /"
    }

Jackson will attempt to instantiate whatever class is named. If the classpath contains exploitable "gadget" classes, arbitrary code execution may occur during deserialization—before your code ever runs.
Confidence
85% confidence
Finding
Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).

Static analysis

No suspicious patterns detected.