1. Advisory Information
Title: InFocus IN3128HD Projector Multiple Vulnerabilities
Advisory ID: CORE-2015-0008
Advisory URL:
http://www.coresecurity.com/advisories/infocus-in3128hd-projector-multiple-vulnerabilities
Date published: 2015-04-27
Date of last update: 2015-04-22
Vendors contacted: InFocus
Release mode: User release
2. Vulnerability Information
Class: Authentication Bypass Using an Alternate Path or Channel [CWE-288],
Missing Authentication for Critical Function [CWE-306]
Impact: Security bypass
Remotely Exploitable: Yes
Locally Exploitable: No
CVE Name: CVE-2014-8383, CVE-2014-8384
3. Vulnerability Description
The InFocus [1] IN3128HD brings 1080p projection into the classroom with a
bright 4000-lumen display, versatile connections and smart networking features.
It's portable enough to go from room to room, yet powerful enough to be
installed in a fixed position.
The InFocus IN3128HD [2] Projector is vulnerable to an authentication bypass in
its web interface login page, and is missing authentication for the
"webctrl.cgi.elf" CGI file, which allows several actions to be performed or
configured inside the device.
4. Vulnerable Packages
InFocus IN3128HD v0.26 Firmware
Other products and versions might be affected too, but they were not tested.
5. Vendor Information, Solutions and Workarounds
Core Security recommends affected users avoid connecting their vulnerable
devices to a remotely accessible network.
Contact the vendor for further information.
6. Credits
This vulnerability was discovered and researched by Joaquin Rodriguez Varela
from Core Security CoreLabs Team. The publication of this advisory was
coordinated by the Core Security Advisories Team.
7. Technical Description / Proof of Concept Code
7.1. Authentication Bypass in web server interface
The InFocus IN3128HD projector web server interface requires an admin password
in order to view or modify the device configuration parameters. The
vulnerability [CVE-2014-8383] is caused by a user's ability to bypass the login
page (index.html) by knowing the name of the page (main.html) to which a logged
user is forwarded after entering the correct password. The restricted pages
contain no control whatsoever of logged or unauthenticated users. The login
only checks the entered password and does not generate a session cookie if the
user logs in correctly. The following URL allows an alternate preauth path to
the restricted section:
http://<Projector-web-interface-IP>/main.html
This allows an unauthenticated user to access the device as an administrator
and to see private information such as network configuration (network mask, DNS
server, gateway, etc), WiFi configuration (including password), and the ability
to modify any of these parameters.
7.2. Missing Authentication for Critical CGI file
The vulnerability [CVE-2014-8384] is caused by a missing authentication
mechanism for the "webctrl.cgi.elf" CGI file, which is used by the web server
to apply configuration changes. This file is located inside the "cgi-bin"
folder, and is accessible by any unauthenticated user, allowing it to perform
several configuration modifications and actions inside the projector.
Here are some examples of what can be done remotely and without authentication
if the following URLs are used:
Modify any parameter in the DHCP Server configuration:
http://<Projector-web-interface-IP>/cgi-bin/webctrl.cgi.elf?&t:26,c:5,p:525294,s:00011&t:26,c:5,p:525295,s:0009<START-IP>&t:26,c:5,p:525296,s:0011<END-IP>&t:26,c:5,p:525297,s:0013<SUBNET-MASK-IP>&t:26,c:5,p:525298,s:0011<DEFAULT-GATEWAY-IP>&t:26,c:5,p:525299,s:0012<DNS-SERVER-IP>
Modify any parameter in the device IP configuration (DNS server as well):
http://<Projector-web-interface-IP>/cgi-bin/webctrl.cgi.elf?&t:26,c:5,p:525288,s:0006static&t:26,c:5,p:525289,s:0007<IP-ADDRESS>&t:26,c:5,p:525290,s:0013<SUBNET-MASK-IP>&t:26,c:5,p:525291,s:0007<DEFAULT-GATEWAY-IP>&t:26,c:5,p:525292,s:0007<DNS-SERVER-IP>
Remotely reboot the device (not only the web server):
http://<Projector-web-interface-IP>/cgi-bin/webctrl.cgi.elf?&t:26,c:5,p:720896
Change the device hostname:
http://<Projector-web-interface-IP>/cgi-bin/webctrl.cgi.elf?&t:26,p:589826,c:5,s:0006<NEW-HOSTNAME>
Several other actions and configurations can be performed using this CGI file,
but is trivial to detail all of them considering that are the same actions a
user can perform from the web interface.
8. Report Timeline
2015-04-07: Core Security sent an initial notification to InFocus.
2015-04-13: Core Security sent another notification to InFocus using their
online contact support form [3].
2015-04-14: Core Security tried to contact InFocus employees using LinkedIn
without success.
2015-04-16: Core Security contacted InFocus using Twitter and requested an
email address that could be used to contact them.
2015-04-16: InFocus replied using their official Twitter account indicating
that product support questions should be directed to the form at
infocus.com/support/ or supp...@infocus.com.
2015-04-16: Core Security sent another email to the provided email requesting
an answer.
2015-04-20: Core Security sent another email to the provided email account
stating that an answer had not yet been received, and if that was still true on
Friday, April 24, Core Security would be forced to publish its findings on
Monday, April 27.
2015-04-21: Core Security contacted InFocus again using Twitter and explained
that multiple attempts to contact them had been performed without any luck and
requested a response.
2015-04-21: InFocus replied using their official Twitter account asking us to
provide an email account so a support representative could contact us.
2015-04-21: Core Security provided the official advisories email in order to be
contacted by an InFocus representative.
2015-04-22: InFocus sent an email stating that they were requested by their
public relations department to contact Core Security. They asked Core to send
them the draft version of the advisory.
2015-04-22: Core Security explained that it is not recommended to send this
kind of information in plain text and asked if they could use PGP to send
encrypted emails. In case they didn't want to use encrypted communications,
Core was willing to send the draft advisory in plain text.
2015-04-22: InFocus informed Core Security that they no longer had any desire
to see the information (advisory) and told Core to publish it if we felt it
necessary.
2015-04-22: Core Security replied to InFocus that Core regretted their decision
and that Core's only objective is to make users safer. We informed them that we
will now have to make a user-release of the advisory without giving their
affected users an alternative to solve the issues.
2015-04-27: Advisory CORE-2015-0008 published.
9. References
[1] http://www.infocus.com.
[2] http://www.infocus.com/projectors/IN3128HD.
[3] http://www.infocus.com/support/.
10. About CoreLabs
CoreLabs, the research center of Core Security, is charged with anticipating
the future needs and requirements for information security technologies. We
conduct our research in several important areas of computer security including
system vulnerabilities, cyber attack planning and simulation, source code
auditing, and cryptography. Our results include problem formalization,
identification of vulnerabilities, novel solutions and prototypes for new
technologies. CoreLabs regularly publishes security advisories, technical
papers, project information and shared software tools for public use at:
http://corelabs.coresecurity.com.
11. About Core Security Technologies
Core Security Technologies enables organizations to get ahead of threats with
security test and measurement solutions that continuously identify and
demonstrate real-world exposures to their most critical assets. Our customers
can gain real visibility into their security standing, real validation of their
security controls, and real metrics to more effectively secure their
organizations.
Core Security's software solutions build on over a decade of trusted research
and leading-edge threat expertise from the company's Security Consulting
Services, CoreLabs and Engineering groups. Core Security Technologies can be
reached at +1 (617) 399-6980 or on the Web at: http://www.coresecurity.com.
12. Disclaimer
The contents of this advisory are copyright (c) 2015 Core Security and (c) 2015
CoreLabs, and are licensed under a Creative Commons Attribution Non-Commercial
Share-Alike 3.0 (United States) License:
http://creativecommons.org/licenses/by-nc-sa/3.0/us/
13. PGP/GPG Keys
This advisory has been signed with the GPG key of Core Security advisories
team, which is available for download at
http://www.coresecurity.com/files/attachments/core_security_advisories.asc.
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