T05 · Unauthorized Access and Privilege Escalation
- Location
SKILL.md:13- Finding
Excessive Filesystem and Command-Execution Permissions
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 13–16; related capability declarations at lines 62, 342–344, and 357
Vulnerability Type: Excessive privileges and insufficiently constrained system access
Risk Level: MediumVulnerable Configuration
yaml tools: - read - exec - writeThe skill additionally declares that it can perform CRUD operations, update system state, read and write files, and execute system commands. Its troubleshooting guidance also recommends running with administrator privileges when access is denied.
Technical Analysis
The skill is presented primarily as a wrapper for a dashboard analytics API. That purpose does not inherently require unrestricted local command execution or general filesystem write access. Nevertheless, the skill requests
read,exec, andwritecapabilities without defining enforceable restrictions on:- Files and directories that may be accessed.
- Commands and executable paths that may be invoked.
- Arguments that may be supplied to commands.
- Shell metacharacters or user-controlled command fragments.
- Operations that may modify local system state.
- Situations requiring explicit user approval.
- The security properties of the claimed execution sandbox.
The document states that only allowlisted commands should be executed, but it does not provide or enforce such an allowlist. Documentation-level guidance alone does not prevent an agent from interpreting a crafted analytics request as authorization to perform unrelated file or command operations.
The recommendation to run with administrator privileges could further increase impact if followed. It is not itself an automatic privilege-escalation mechanism, but it encourages execution with privileges beyond those ordinarily required for an API analytics task.
Attack Path
- An attacker supplies a crafted dashboard, API, file-processing, or troubleshooting request containi ...[truncated 1714 chars]
- Remediation
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Remediation Suggestions
- Remove
execandwritefrom the declared tools unless a documented, essential workflow requires them. - For API-only operations, use a dedicated HTTP/API tool rather than a general-purpose shell.
- Restrict filesystem reads and writes to explicit, user-approved paths under a dedicated workspace directory.
- Define and technically enforce a command allowlist containing exact executable paths and permitted arguments.
- Avoid invoking commands through a shell. Use structured process APIs with fixed argument arrays, and reject shell metacharacters or attacker-controlled command fragments.
- Require explicit user confirmation before file modification, deletion, command execution, or any system-state change.
- Run the skill under a dedicated, unprivileged account with minimal filesystem and network permissions.
- Remove the recommendation to run as administrator. Permission failures should be resolved by granting narrowly scoped access to the required resource.
- Document the sandbox boundary, permitted paths, allowed commands, network destinations, and denial behavior.
- Validate all API URLs, parameters, file paths, and formats against strict schemas before using them with privileged tools.
- Record security-relevant operations in an audit log while redacting API keys, tokens, and sensitive data.
- Add negative security tests covering path traversal, command injection, unauthorized file access, shell metacharacters, and privilege-boundary violations.
- Remove