overflow.c


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/*
 * overflow.c
 *
 *  Created on: 27.01.2012
 *      Author: druid
 */

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

#define BUFLEN    300

void
overflow(const char *src)
{
  char buf[BUFLEN];
  /* exploitable function */
  strcpy(&buf[0], src);
  /* nothing to do, just return */
}

int
main(int argc, char **argv)
{
  /* force system() symbol import for return-to-lib.c exploitation */
  void * system_fn = system;
  (void)system_fn;

  if (argc > 1) {
      overflow(argv[1]);
  } else {
    fprintf(stderr, "arg1 missing\n");
    return(1);
  }

  return (0);
}