Bugtraq mailing list archives
Re: Cross-Site Scripting (XSS) in Php-Nuke 7.1.0
From: Anthony Petito <anthonypetito () gmail com>
Date: Wed, 18 Aug 2004 04:36:16 -0700
Uhm.. Why does your proof match almost exactly what was posted back on 10 February? http://www.net-security.org/vuln.php?id=3245 I mean.. even down to the examples. Come on! -Anthony On 17 Aug 2004 12:28:36 -0000, Abu Lafy <off () hotmail com> wrote:
Affected software description: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Php-Nuke is popular freeware content management system, written in php by Francisco Burzi. This CMS (COntent Management System) is used on many thousands websites, because it`s free of charge, easy to install and has broad set of features. Homepage: http://phpnuke.org Vulnerabilities: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ If we look at Php-Nuke`s history, then we can find many cases reporting the XSS in Php-Nuke. Most of them are fixed by now, when we have allready version 7.1.0 available. Despite this I found two new cases of XSS in Php-Nuke 6.x-7.1.0 , maybe in older versions too. Exploit: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Let`s look at code from "/modules/News/friend.php" line 84-92 (Php-Nuke 7.1.0): function StorySent($title, $fname) { include ("header.php"); $title = urldecode($title); $fname = urldecode($fname); OpenTable(); echo "<center><font class=\"content\">"._FSTORY." <b>$title</b> "._HASSENT." $fname... "._THANKS."</font></center>"; CloseTable(); include ("footer.php"); } If we deliver $title or $fname by GET or POST variable, then we have XSS conditions here. But Php-Nuke will reject GET and POST requests with <script> tags. One way to evade this filter is the using of <img src=foo onload=[code here]>. There is better way to exploit the XSS, and it`s the using of partially or fully urlencoded ("hexed") script for exploit. And because we have lines $title = urldecode($title); and $fname = urldecode($fname); in original code, it will be urldecoded and will work for us, but GET or POST filtering can`t recognize the "<script>" pattern. Same problem has one more module - "Reviews". Proof of concept examples: http://f00bar.com/modules.php?name=News&file=friend&op=StorySent&title=%253cscript>alert%2528document.cookie);%253c/script> http://f00bar.com/modules.php?name=Reviews&rop=postcomment&title=%253cscript>alert%2528document.cookie);%253c/script> ================== Abu Lafy
-- Anthony Petito
Current thread:
- Cross-Site Scripting (XSS) in Php-Nuke 7.1.0 Abu Lafy (Aug 17)
- Re: Cross-Site Scripting (XSS) in Php-Nuke 7.1.0 Anthony Petito (Aug 20)