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Security audit

Perdoo

Security checks for vulnerabilities and agentic risk

Overview

Review is warranted because setup executes unverified downloaded code and leaves additional agent-skill installation uncontrolled.

Install a verified CLI release yourself before enabling this skill, and review or disable its automatic agent-skill synchronization. Connecting Perdoo authorizes OOMOL to handle its operations; use appropriate account permissions and review write payloads. The Perdoo confirmation controls are clear, but the downloaded installer contents remain unverified.

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 chunk installs software from an Oomol-hosted endpoint; it contains no Perdoo data access or management behavior and establishes no connection between this installer and the declared Perdoo functionality. This is an undeclared installation and code-execution capability, not a demonstrated supporting detail of the stated purpose. The downloaded script's contents and further effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
97% confidence
Finding

Piping a remotely fetched script directly into Bash executes its current contents without a pinned version or independent integrity verification; the PowerShell alternative has the same trust problem. Compromise of the installer distribution could execute arbitrary code with the invoking user's permissions, although the missing-CLI condition limits when this path is reached and there is no evidence of malicious intent.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

The setup workflow executes downloaded installation scripts without warning about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
91% confidence
Finding

The missing-CLI fallback directs installation without requiring approval or explaining that downloaded code will execute locally and may modify the environment. Its conditional nature reduces exposure, but a request to operate Perdoo does not necessarily authorize installing software; this overlaps with the remote-execution issue in SC2.

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 79)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