Security audit

Certcheck

Security checks for vulnerabilities and agentic risk

Overview

This is an offline reference skill that prints static Certcheck documentation; the scanner's credential concern is only generic documentation text, not actual credential access.

Reasonable to install as a static reference helper. Treat its Certcheck content as generic guidance rather than authoritative product documentation, and note the minor packaging mismatch between the skill version and script version.

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 (1)

Credential Access

High

Category: Privilege Escalation
Confidence: 70% confidence
Finding: Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
Content: Scanner excerpt · scripts/script.sh (reported line 64)May include surrounding context.
sh
## Prerequisites - Basic understanding of security concepts - Required tools and access credentials - System meeting minimum requirements ## Installation

Static analysis

No suspicious patterns detected.