Operating System:

[Appliance]

Published:

07 December 2015

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.3044
               Honeywell Midas Gas Detector Vulnerabilities
                              7 December 2015

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Honeywell Midas Gas Detector
Publisher:         US-CERT
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote with User Interaction
                   Unauthorised Access    -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7908 CVE-2015-7907 

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-15-309-02

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Advisory (ICSA-15-309-02)

Honeywell Midas Gas Detector Vulnerabilities

Original release date: December 03, 2015

Legal Notice

All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security 
(DHS) does not provide any warranties of any kind regarding any information 
contained within. DHS does not endorse any commercial product or service, 
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For 
more information about TLP, see http://www.us-cert.gov/tlp/.

OVERVIEW

This advisory was originally posted to the US-CERT secure Portal library on 
November 5, 2015, and is being released to the ICS-CERT web site.

Independent researcher Maxim Rupp has identified two vulnerabilities in 
Honeywells Midas gas detector. Honeywell has produced firmware versions to 
mitigate these vulnerabilities.

These vulnerabilities could be exploited remotely.

AFFECTED PRODUCTS

The following Midas versions are affected:

   Midas, Version 1.13b1 and prior versions, and

   Midas Black, Version 2.13b1 and prior versions.

IMPACT

Successful exploitation of these vulnerabilities could allow a remote attacker
to gain unauthenticated access to the device, potentially allowing 
configuration changes, as well as the initiation of calibration or test 
processes.

Impact to individual organizations depends on many factors that are unique to
each organization. NCCIC/ICS-CERT recommends that organizations evaluate the 
impact of these vulnerabilities based on their operational environment, 
architecture, and product implementation.

BACKGROUND

Honeywell is a US-based company that maintains offices worldwide.

The affected products, Midas and Midas Black gas detectors, test air for 
specific toxic, flammable, and ambient gases. According to Honeywell, Midas 
gas detectors are deployed across several sectors including Chemical, 
Commercial Facilities, Critical Manufacturing, Energy, Food and Agriculture, 
Water and Wastewater Systems. Honeywell estimates that these products are used
worldwide.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

PATH TRAVERSAL [a]

The web server interface allows the authentication process to be bypassed, 
potentially allowing unauthorized configuration changes to be made to the 
device, as well as the initiation of calibration or test processes.

CVE-2015-7907 [b] has been assigned to this vulnerability. A CVSS v3 base 
score of 8.6 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L). [c]

CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION [d]

The users password is not encrypted during transmission.

CVE-2015-7908 [e] has been assigned to this vulnerability. A CVSS v3 base 
score of 9.4 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L). [f]

VULNERABILITY DETAILS

EXPLOITABILITY

These vulnerabilities could be exploited remotely.

EXISTENCE OF EXPLOIT

No known public exploits specifically target these vulnerabilities.

DIFFICULTY

An attacker with low skill would be able to exploit these vulnerabilities.

MITIGATION

Honeywell has released new firmware versions of the Midas and Midas Black gas
detectors, which address the identified vulnerabilities. The new firmware 
versions for the Midas gas detector, Version 1.13b3, and the Midas Black gas 
detector, Version 2.13b3, are available at the following URL:

http://www.honeywellanalytics.com/en-ca/products/Midas(link is external)

Honeywell recommends that new versions should be installed on all affected 
products. Until a new version is applied, Honeywell strongly suggests that 
customers with affected products should take the following steps to protect 
themselves:

   Allow only trained and trusted persons to have physical access to the 
   system, to include devices connected to the system through the Ethernet 
   port;

   Isolate the system from the Internet, or create additional layers of 
   defense by placing the affected hardware behind a firewall or into a DMZ;
   and

   If remote connections to the device are required, consider using a Virtual 
   Private Networks (VPN) or other means to ensure secure remote connections 
   into the network.

Honeywells Security Notification, SN 2015-10-14 01 is available at the 
following URL:

http://www.honeywellanalytics.com/en/products/Midas(link is external)

ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:

   Minimize network exposure for all control system devices and/or systems, 
   and ensure that they are not accessible from the Internet.

   Locate control system networks and remote devices behind firewalls, and 
   isolate them from the business network.

   When remote access is required, use secure methods, such as VPNs, 
   recognizing that VPNs may have vulnerabilities and should be updated to the
   most current version available. Also recognize that VPN is only as secure 
   as the connected devices.

ICS-CERT reminds organizations to perform proper impact analysis and risk 
assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended 
practices on the ICS-CERT web page at: 
http://ics-cert.us-cert.gov/content/recommended-practices. Several recommended
practices are available for reading and download, including Improving 
Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly 
available in the ICSCERT Technical Information Paper, 
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site 
(http://ics-cert.us-cert.gov/).

Organizations observing any suspected malicious activity should follow their 
established internal procedures and report their findings to ICS-CERT for 
tracking and correlation against other incidents.

a. CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path
Traversal'), http://cwe.mitre.org/data/definitions/22.html, web site last 
accessed December 03, 2015.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7907, NIST 
uses this advisory to create the CVE web site report. This web site will be 
active sometime after publication of this advisory.

c. CVSS Calculator, 
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S..., 
web site last accessed December 03, 2015.

d. CWE-319: Cleartext Transmission of Sensitive Information, 
http://cwe.mitre.org/data/definitions/319.html, web site last accessed 
December 03, 2015.

e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7908, NIST 
uses this advisory to create the CVE web site report. This web site will be 
active sometime after publication of this advisory.

f. CVSS Calculator, 
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S..., 
web site last accessed December 03, 2015.

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov(link sends e-mail)

Toll Free: 1-877-776-7585

International Callers: (208) 526-0900

For industrial control systems security information and incident reporting: 
http://ics-cert.us-cert.gov

ICS-CERT continuously strives to improve its products and services. You can 
help by choosing one of the links below to provide feedback about this 
product.

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NOTE: This is only the original release of the security bulletin.  It may
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