sqlmapproject/sqlmap · error · InterfaceError

invalid Firebird length (%d)

Error message

invalid Firebird length (%d)

What it means

Error "invalid Firebird length (%d)" thrown in sqlmapproject/sqlmap.

Source

Thrown at extra/dbwire/firebird.py:307

        self._rc = self._wc = None

    def set_ciphers(self, rc, wc):
        self._rc, self._wc = rc, wc

    def send(self, data):
        try:
            self._sock.sendall(self._wc.translate(data) if self._wc else data)
        except (socket.error, OSError) as ex:
            raise connection_lost(ex)

    def _recv_raw(self, n):
        return recvn(self._sock, n)

    def recv(self, n, align=False):
        # every length here comes off the wire (response buffers, status strings, per-value lengths): a
        # negative one would silently return short data, a huge one would read until memory ran out
        if n < 0 or n > _MAX_MESSAGE_LENGTH:
            raise InterfaceError("invalid Firebird length (%d)" % n)
        total = n + ((4 - n % 4) % 4) if align else n
        data = self._recv_raw(total)
        if self._rc:
            data = self._rc.translate(data)
        return data[:n]

    def recv_int(self):
        return struct.unpack("!i", self.recv(4))[0]

    def recv_bytes(self):
        return self.recv(self.recv_int(), align=True)

    def close(self):
        try:
            self._sock.close()
        except Exception:
            pass

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at extra/dbwire/firebird.py:307 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of sqlmapproject/sqlmap@0a35b20e39 (2026-08-26). Data as JSON: /api/errors/611340515083d0f8. Report an issue: GitHub.