T05 · Unauthorized Access and Privilege Escalation
Error
- Location
scripts/web_server.py:121- Finding
Unauthenticated Network Access to Loaded PDF Documents and Editing Operations
- Content
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Vulnerability Details
File Location:
scripts/web_server.py, lines 121–304 and 332
Vulnerability Type: Missing authentication and unsafe network exposure
Risk Level: HighVulnerable Code
python def do_GET(self): parsed = urlparse(self.path) path = parsed.path params = parse_qs(parsed.query) # ... elif path.startswith('/api/text-blocks/'): try: page_num = int(path.split('/')[-1]) EditorState.ensure() spans = EditorState.editor.get_page_text(page_num) # ... self._send_json(blocks) except Exception as e: self._send_json({"error": str(e)}, 400)python def do_POST(self): parsed = urlparse(self.path) path = parsed.path try: if path == '/api/open': form = self._parse_multipart() file_item = form.get('file') if file_item and isinstance(file_item, tuple) and len(file_item) == 2: filename, file_data = file_item tmp_file = os.path.join(EditorState.tmp_dir, 'document.pdf') with open(tmp_file, 'wb') as f: f.write(file_data) EditorState.open(tmp_file) self._send_json(EditorState.editor.info()) # ... elif path == '/api/download': EditorState.ensure() import io buf = io.BytesIO() EditorState.editor.doc.save(buf) buf.seek(0) filename = os.path.basename(EditorState.filepath or 'edited.pdf') if not filename.endswith('.pdf'): filename += '.pdf' self._send_binary(buf.read(), filename)python def do_DELETE(self): parsed = urlparse(self.path) path = parsed.path try: if path.startswith('/api/delete-page/'): page_num = ...[truncated 2896 chars]- Remediation
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Remediation Suggestions
- Bind to the loopback interface by default:
python server = HTTPServer(('127.0.0.1', args.port), Handler) - Require an explicit, prominently warned command-line option before allowing non-loopback binding.
- Generate a cryptographically random authorization token for every server launch and require it on all API requests, including read-only endpoints.
- Reject requests with unexpected
HostandOriginheaders to reduce cross-origin and DNS-rebinding exposure. - Replace the process-wide shared editor state with state isolated by authenticated session.
- Apply authorization checks uniformly to document download, text extraction, rendering, upload, editing, saving, and deletion endpoints.
- Consider CSRF protection for state-changing operations, even when loopback binding is used.
- Add request-size limits for uploaded files and JSON or multipart bodies to reduce resource-exhaustion exposure.
- Document the actual listening interface and security model accurately rather than describing the service as purely local while binding it to all interfaces.
- Bind to the loopback interface by default: