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AUSCERT External Security Bulletin Redistribution
ESB-2014.1228
Honeywell FALCON XLWeb Controllers Vulnerabilities
24 July 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Honeywell FALCON XLWeb Controllers
Publisher: ICS-CERT
Operating System: Linux variants
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Cross-site Request Forgery -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2014-3110 CVE-2014-2717
Original Bulletin:
http://ics-cert.us-cert.gov//advisories/ICSA-14-175-01
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Advisory (ICSA-14-175-01)
Honeywell FALCON XLWeb Controllers Vulnerabilities
Original release date: July 22, 2014
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 June 24, 2014, and is being released to the NCCIC/ICS-CERT web site.
Martin Jartelius of Outpost24 has identified an authentication bypass
vulnerability in Honeywell FALCON XLWeb controllers. Juan Francisco Bolivar
has identified cross-site scripting vulnerabilities in Honeywell FALCON
XLWeb controllers. Honeywell has produced an update that mitigates both
vulnerabilities. Mr. Jartelius has tested the update to validate that it
resolves the vulnerability that he reported. These vulnerabilities could
be exploited remotely.
AFFECTED PRODUCTS
The following Honeywell FALCON XLWeb controller versions are affected:
FALCON Linux 2.04.01 or older
FALCON XLWebExe 2.02.11 or older.
IMPACT
An attacker may use these vulnerabilities to generate a valid login for
an administrative user on the Honeywell FALCON XLWeb controller giving
the attacker full administrator access to the system.
Impact to individual organizations depends on many factors that are unique
to each organization. ICS-CERT recommends that organizations evaluate
the impact of this vulnerability based on their operational environment,
architecture, and product implementation.
BACKGROUND
Honeywell is a US-based company that maintains offices worldwide.
The affected products, FALCON XLWeb controllers, are web-based SCADA
systems. According to Honeywell, FALCON XLWeb controllers are deployed
across several sectors including Critical Manufacturing, Energy, Water
and Wastewater Systems, and others. According to Honeywell, the affected
controllers are used by customers primarily in Europe and the Middle East.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
FILE ACCESSIBLE TO EXTERNAL PARTIES[a]
The change password page can be accessed without a valid session or
authentication. This page can be used to disclose a user's password hash
or login as a user without knowing the user's password, making it possible
for an attacker to login as an administrative user.
CVE-2014-2717[b] has been assigned to this vulnerability. A CVSS
v2 base score of 7.6 has been assigned; the CVSS vector string is
(AV:N/AC:H/Au:N/C:C/I:C/A:C).[c]
CROSS-SITE SCRIPTING[d]
The web server is vulnerable to several cross-site scripting attacks. By
sending invalid input through the XL Web controllers, an attacker can
execute arbitrary HTML and script code in another user's browser session.
CVE-2014-3110[e] has been assigned to this vulnerability. A CVSS
v2 base score of 4.3 has been assigned; the CVSS vector string is
(AV:N/AC:M/Au:N/C:P/I:N/A:N).[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 a moderate skill would be able to exploit these
vulnerabilities.
MITIGATION
Honeywell posted a Security Bulletin on Centraline Partnerweb[g] (login
required) that tells how to update FALCON controllers to the latest version.
Honeywell also offers the following advice:
FALCON controllers (referred to as "XLWeb") can be found unprotected
in the Internet. Because this poses the risk of unauthorized access,
immediate action should be taken in order to protect them from
unauthorized access.
All Internet facing FALCON controllers should be operated either in
internal networks, or use a coded VPN connection for internet access,
in order to limit unauthorized access.
ICS-CERT encourages asset owners to take additional defensive measures to
protect against this and other cybersecurity risks.
Locate control system networks and remote devices behind firewalls,
and isolate them from the business network.
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. ICS-CERT reminds organizations to perform proper impact analysis
and risk assessment prior to deploying defensive measures.
Additional mitigation guidance and recommended practices are
publicly available in the ICS-CERT 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
(www.ics-cert.org).
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-552: Files or Directories Accessible to Parties,
http://cwe.mitre.org/data/definitions/552.html, web site last accessed
July 22, 2014.
b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2717,
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,
http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:H/Au:N/C:C/I:C/A:C,
web site last accessed July 22, 2014.
d. CWE-79: Improper Neutralization of Input During Web Page Generation
("Cross-site Scripting"), http://cwe.mitre.org/data/definitions/79.html,
web site last accessed July 22, 2014.
e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3110,
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,
http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:M/Au:N/C:P/I:N/A:N,
web site last accessed July 22, 2014.
g. Centraline by Honeywell login page,
https://www.centraline.com/index.php?id=1, web site last accessed July
22, 2014.
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov
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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The University of Queensland
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