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Security audit

Splunk HTTP Event Collector

Security checks for vulnerabilities and agentic risk

Overview

The Splunk integration is clearly described, but its setup fallback directs execution of downloaded installers without verification or separate approval.

Review the setup path before installing. Prefer a verified CLI release and require approval before downloaded installation code runs. Confirm each event payload and consider whether its contents are appropriate to send through OOMOL. The complete bundled document was inspected, but remote installer behavior remains 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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command performs remote installer execution, not a Splunk HTTP Event Collector request. Although installation can be a supporting implementation detail, the provided chunk establishes no relationship between this installer and the declared Splunk functionality. The downloaded script's further behavior is not visible.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
87% confidence
Finding

Authentication can be a supporting implementation detail, but the supplied chunk consists solely of a login command with no demonstrated connection to Splunk. Its observable purpose therefore differs materially from the declared Splunk data-access purpose. The command alone does not establish credential theft or other malicious behavior.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

Piping the HTTPS response directly into bash executes mutable remote code without inspecting or verifying the downloaded artifact. Although the domain is consistent with the documented CLI provider and installation is conditional, compromise of the distribution endpoint or release pipeline could lead to local code execution and exposure of accessible files or credentials.

Content

Scanner excerpt · SKILL.md (reported line 56)May include surrounding context.

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

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The fallback directs execution of downloaded shell and PowerShell installers without an explicit installation approval gate or integrity verification. A missing CLI makes this path reachable during ordinary use, and a compromised installer could execute arbitrary code with the invoking user's privileges; the concern is execution of unverified code, not merely the missing warning.

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 77)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