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Unsafe unlink[Korean]
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" data-ad-slot="3793401480"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> heap-exploitation double_free-kr02.Heap Exploitation
List Heap Exploit Exploit table Exploits Access area Overwrite area Free Fake chunk Stack Heap Top chunk F - size F - bk A - prev_size A - size Double Free Free(Stack area) Stack area Heap area First fit O Fastbin dup O O12.Heap Feng Shui
조정함으로써 Exploit에 영향을 줄 수 있는 Heap 레이아웃의 형태를 Heap Feng Shui라고 합니다. 1533191076315.jpg Structure of Exploit code Heap Feng Shui Heap Overflow Overwrite … " src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script> List Heap Feng Shui Heap Feng Shui란 Heap영역 할당된 chunk의 레이아웃을 조작하여11.Heap Spray
확인하기 위해 다음과 같이 프로세스를 백그라운드로 실행합니다. lazenca0x0@ubuntu:~/Exploit/HeapSpray$ ./poc & [1] 30346 lazenca0x0@ubuntu:~/Exploit/HeapSpray$ Heap spray! Input size: [1]+ Stopped ./poc lazenca0x0@ubuntu:~/Exploit/HeapSpray$ ./poc & [2] 30347 lazenca0x0@ubuntu:~/Exploit/HeapSpray$ Heap spray! Input size: [210.One-gadgets(feat. PLT/GOT overwrite)
찾습니다. lazenca0x0@ubuntu:~/Exploit/OneGadgets$ strings -tx /lib/x86_64-linux-gnu/libc-2.23.so |grep /bin/sh 18cd57 /bin/sh lazenca0x0@ubuntu:~/Exploit … . 45278 영역에서 두번째 인가 값으로 RSI 레지스터에 [rsp+0x30]영역의 값을 저장합니다. 즉, 해당 One gadget을 사용하기 위해서는 [rsp+0x30]영역의 값 Null(0)이어야만 합니다. lazenca0x0@ubuntu:~/Exploit