Vulnerability Mining Method for the Modbus TCP Using an Anti-Sample Fuzzer

. 2020 Apr 5;20(7):2040. doi: 10.3390/s20072040

Algorithm 2: Complete Test Case Generation Algorithm

input:

{\hat{Y}}_{i}

←generated PDU message
output:

{\hat{Y}}_{i}

←complete test case

(1)
$u n i t \leftarrow hex (random . Int (0, 255))$ ▽ decimal to hex
(2)
$l e n g t h \leftarrow hex (len ({\hat{Y}}_{i}) + 1)$
(3)
$t r a n s a c t i o n_I D \leftarrow hex (random . Int (0, 65535))$
(4)
$p r o t o c o l_I D \leftarrow hex (0)$
(5)
${\hat{Y}}_{i} \leftarrow (t r a n s a c t i o n_I D, p r o t o c o l_I D, l e n g t h, u n i t, {\hat{Y}}_{i})$