Back to skill

Security audit

Oracle Cloud Infrastructure

Security checks for vulnerabilities and agentic risk

Overview

This Oracle Cloud management skill needs review because it misclassifies a potentially disruptive action and executes an unverified installer during setup.

Before installing, require explicit approval for instance_action and verify the target and effect. Review a fixed CLI release and its installation behavior, including automatic changes to agent skills. Use narrowly scoped Oracle credentials and understand that OOMOL mediates account operations. The external installer and hosted connector implementation were not audited.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied command performs remote installer execution, not an OCI operation. Although installing dependencies can be a supporting implementation detail, this chunk provides no evidence connecting the Oomol installer to the declared OCI purpose. The downloaded script's contents and any further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The fallback installation command immediately executes remotely downloaded shell code without a pinned version or independent integrity verification; the PowerShell alternative has the same weakness. If the distribution endpoint or release pipeline is compromised, an installation attempt could execute arbitrary code with the local user's privileges and expose local credentials, although the missing-CLI condition limits when this path is reached.

Content

Scanner excerpt · SKILL.md (reported line 88)May include surrounding context.

The untagged `instance_action` contradicts the guarantee that untagged actions are read-only.

Medium
Category
Excessive Agency
Confidence
98% confidence
Finding

The skill leaves instance_action untagged while explicitly instructing the agent to treat all untagged actions as reads that are safe to run directly. Instance lifecycle actions can change operational state, so this classification can bypass user confirmation and cause outages; fetching the input schema does not correct the missing approval requirement.

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 109)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