sqlmapproject/sqlmap · error · InterfaceError

malformed server response: %s

Error message

malformed server response: %s

What it means

Error "malformed server response: %s" thrown in sqlmapproject/sqlmap.

Source

Thrown at extra/dbwire/firebird.py:497

    def _send(self, data):
        self._wire.send(data)

    def _response(self):
        op = self._wire.recv_int()
        while op == _op_dummy:
            op = self._wire.recv_int()
        if op != _op_response:
            raise OperationalError("unexpected Firebird operation %d" % op)
        return _parse_response(self._wire)

    # ---- query ----

    def _query(self, query):
        try:
            return self._run(query)
        except (struct.error, IndexError, ValueError, KeyError) as ex:
            raise InterfaceError("malformed server response: %s" % ex)

    def _run(self, query):
        qbytes = query.encode("utf-8")
        self._send(_pack_int(_op_allocate_statement) + _pack_int(self._db_handle))
        stmt = self._response()[0]

        try:
            desc_items = bytes(bytearray([_isc_info_sql_stmt_type])) + _INFO_SQL_SELECT_DESCRIBE_VARS
            self._send(_pack_int(_op_prepare_statement) + _pack_int(self._trans_handle) + _pack_int(stmt) +
                       _pack_int(3) + _pack_bytes(qbytes) + _pack_bytes(desc_items) + _pack_int(1024))
            buf = self._response()[2]
            stmt_type, columns = self._parse_describe(stmt, buf)

            exec_msg = (_pack_int(_op_execute) + _pack_int(stmt) + _pack_int(self._trans_handle) +
                        _pack_bytes(b"") + _pack_int(0) + _pack_int(0) + _pack_int(0))
            self._send(exec_msg)
            self._response()

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at extra/dbwire/firebird.py:497 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of sqlmapproject/sqlmap@0a35b20e39 (2026-08-26). Data as JSON: /api/errors/ee49cfccad24e9d5. Report an issue: GitHub.