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Security audit

Anrok

Security checks for vulnerabilities and agentic risk

Overview

The Anrok read workflow fits its purpose, but setup directs the agent to execute unverified remote installers without a separate approval step.

Review and install the CLI separately before enabling this skill, and require approval before any fallback installer runs. Connecting Anrok allows OOMOL to mediate access to sensitive business data. The remote installer contents and actual installation effects were unavailable for verification; no malicious behavior was established in the bundled skill.

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
Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied code executes an Oomol-hosted installer and contains no Anrok interaction or data-reading functionality. Nothing supplied establishes this installer as a supporting dependency for the declared purpose. The downloaded script's contents are unavailable, so its further effects cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping an HTTPS response directly into bash executes mutable remote content without establishing its integrity or allowing inspection before execution. HTTPS protects transport but not against compromise of the vendor's distribution infrastructure; this is the same underlying installation risk as SQP-2, not a separate attack chain.

Content

Scanner excerpt · SKILL.md (reported line 61)May include surrounding context.

Fallback setup executes remote installation scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback directs execution of remotely downloaded shell or PowerShell scripts without review, integrity verification, or explicit user approval for system changes. If the distribution endpoint or installer is compromised, following this setup instruction could execute attacker-controlled code with the user's privileges; the missing-CLI condition reduces exposure but does not eliminate it.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% 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 82)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources