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Security audit

Jimeng AI

Security checks for vulnerabilities and agentic risk

Overview

The Jimeng integration fits its purpose, but setup can execute a changing online installer without separate user approval.

Review the CLI installation before allowing setup: use a verified release and explicitly approve local changes. Generation inputs pass through OOMOL to the connected provider, and submitted jobs may consume credit. Keep the stated confirmation requirement for writes. No malicious behavior was established, but the remote installers could not be inspected, so their 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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • 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
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The supplied code installs software from an external service; it does not implement the declared Jimeng AI functionality. Nothing in the supplied chunk establishes this installer as a supporting dependency for Jimeng AI. The remote script's contents are unavailable, so its further actions cannot be determined.

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 downloaded code with the agent process's permissions without an independent integrity check or review; the PowerShell example has the same weakness. A compromised distribution endpoint could expose local files or credentials and enable persistence, although there is no evidence here that the endpoint or installer is malicious.

Content

Scanner excerpt · SKILL.md (reported line 82)May include surrounding context.

The setup workflow instructs the agent to execute a downloaded installer without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

When the CLI is missing, the skill directs the agent to install software without first obtaining approval for executing remote code or changing the local environment. The missing-command prerequisite limits exposure, but the confirmation rules cover Jimeng AI writes rather than local installation.

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 103)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

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 108)May include surrounding context.

md
## Resources

- Jimeng AI homepage: https://www.volcengine.com/product/jimeng
- API documentation: https://api.volcengine.com/api-docs/?serviceCode=cv&version=2024-06-06