T09 · Insecure Skill Coding Practices
Warning
- Location
scripts/communication_queue.py:49- Finding
Unauthenticated Message Impersonation and Unauthorized Status Modification
- Content
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Vulnerability Details
File Location:
scripts/communication_queue.py:49-82, 105-116, 124-143and duplicated code intemp-repo2/scripts/communication_queue.py
Vulnerability Type: Missing authentication, authorization, and input validation
Risk Level: MediumVulnerable Code
python def send_message(self, sender: str, receiver: str, content: str, msg_type: str = "message", priority: str = "normal", metadata: Optional[Dict] = None) -> str: msg_id = f"msg_{int(time.time_ns())}_{sender[:3]}" message = { "id": msg_id, "timestamp": datetime.now().isoformat(), "sender": sender, "receiver": receiver, "type": msg_type, "content": content, "priority": priority, "status": "pending", "metadata": metadata or {} } queue = self._read_queue() queue["messages"].append(message) queue["stats"]["total_messages"] += 1 queue["stats"]["pending_messages"] += 1 key = f"{sender}_to_{receiver}" if key in queue["stats"]: queue["stats"][key] += 1 self._write_queue(queue) self._add_to_history(message) return msg_idpython def get_messages(self, receiver: str, status: str = "pending", limit: int = 10) -> List[Dict]: queue = self._read_queue() messages = [ msg for msg in queue["messages"] if msg["receiver"] == receiver and msg["status"] == status ] return messages[:limit]python def mark_as_processed(self, msg_id: str, status: str = "completed"): queue = self._read_queue() for msg in queue["messages"]: if msg["id"] == msg_id: old_status = msg["status"] msg["status" ...[truncated 3026 chars]- Remediation
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Remediation Suggestions
- Define strict allowlists for senders, receivers, message types, priorities, and statuses.
- Reject unknown fields, malformed records, oversized content, and invalid value types before storing or processing messages.
- Assign each participating agent a separate secret or asymmetric signing key.
- Sign canonicalized message records and verify the signature before returning them to consumers.
- Bind the authenticated identity to the
senderfield instead of trusting a caller-supplied sender value. - Require the authenticated intended receiver to perform status transitions.
- Implement an explicit state machine, such as
pendingtoprocessing, followed bycompletedorfailed, and reject all other transitions. - Use separate operating-system identities and restrictive filesystem permissions for the two agents where practical.
- Treat
command,file, andtaskrecords as untrusted data. Never execute their contents without separate authorization and validation. - Apply the same changes to the duplicated implementation under
temp-repo2/scripts/communication_queue.py.