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Security audit

Orimon

Security checks for vulnerabilities and agentic risk

Overview

The Orimon workflow fits its purpose, but setup executes unverified remote installers and leaves broader changes to agent skills unexplained.

Review setup before installing. Prefer a separately reviewed, pinned CLI installation, and decide whether it may install or refresh other agent skills. Upstream documents OO_SKILLS_SYNC_DISABLED for disabling startup skill synchronization. Messages and connected-account access pass through OOMOL, so use only data appropriate for that service. The remote installers could not be inspected; their local effects remain uncertain.

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
96% confidence
Finding

The supplied code only runs an external installer; it contains no Orimon integration or data operations. Installing a dependency could be a supporting implementation detail, but the supplied content establishes no relationship between this Oomol installer and the declared Orimon purpose. The downloaded script's contents and further effects are not visible.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable remote installer directly into bash executes its contents without independent integrity verification or inspection. Compromise of the distribution endpoint or its publishing pipeline could execute arbitrary code with the agent process's permissions; HTTPS and the legitimate dependency relationship do not eliminate this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 55)May include surrounding context.

First-time setup executes remotely downloaded installation scripts without warning about local system changes or requesting approval.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

When the CLI is missing, the skill directs the agent to install software by executing a remote script without first requesting approval or explaining local changes. Although limited to first-time setup, this expands authorization for an Orimon task into local code execution with the agent process's permissions.

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 76)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