T05 · Unauthorized Access and Privilege Escalation
- Location
SKILL.md:27- Finding
Excessive Local Tool Permissions Violate Least Privilege
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 27–30
Vulnerability Type: Excessive filesystem and command-execution permissions
Risk Level: Mediumyaml tools: - read - exec - writeRelated declarations at lines 343–345 advertise generic file processing and system-command execution. The troubleshooting guidance at line 391 also recommends running with administrator privileges when filesystem permissions are insufficient.
Technical Analysis
The Skill's stated purpose is Discord community administration through OAuth and named ClawLink API tools. Arbitrary local file reading, file writing, and shell execution are not necessary for those operations. Granting these generic capabilities violates the principle of least privilege and unnecessarily exposes the host environment to agent-generated actions.
The document does not define filesystem path restrictions, a command allowlist, argument validation, or enforceable sandbox boundaries. Consequently, attacker-controlled or malformed natural-language input could potentially influence the Agent to use these permissions outside the legitimate Discord-management scope. The recommendation to run with administrator privileges could further amplify the impact rather than resolving access failures safely.
Attack Path
- A user or attacker submits crafted input to a session in which this Skill is active.
- The input induces the Agent to treat generic file access or command execution as part of the requested workflow.
- Because the Skill declares
read,write, andexec, the Agent may read local data, modify accessible files, or execute attacker-influenced commands. - If an operation fails because of insufficient permissions, the documented troubleshooting advice may lead the operator to rerun the Agent with administrator privileges.
- The same operation may then affect privileged files, system configuration, or other users' resources.
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- Remediation
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Remediation Suggestions
- Remove
read,write, andexecfrom the declared tools unless a specific, documented Discord workflow strictly requires them. - Restrict the Skill to explicitly named ClawLink and Discord API tools with narrowly validated parameters.
- If local file access is unavoidable, constrain it to a dedicated working directory, reject path traversal, prohibit symbolic-link escapes, and use read-only access wherever possible.
- If command execution is unavoidable, use a fixed command allowlist, pass arguments without shell interpolation, reject metacharacters, impose timeouts, and run in an isolated low-privilege sandbox.
- Remove the recommendation to run as administrator. On permission failure, the Skill should stop safely, explain the required resource, and request only the minimum necessary permission.
- Preserve explicit confirmation for all state-changing Discord operations and add confirmation for any local write or process execution.
- Document enforceable sandbox boundaries and add tests verifying that Discord-related input cannot trigger arbitrary filesystem or shell operations.
- Remove