Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2016.0165
CAREL PlantVisor Enhanced Authentication Bypass Vulnerability
25 January 2016
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: CAREL PlantVisor
Publisher: US-CERT
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0867
Original Bulletin:
http://ics-cert.us-cert.gov/advisories/ICSA-16-021-01
- --------------------------BEGIN INCLUDED TEXT--------------------
Advisory (ICSA-16-021-01)
CAREL PlantVisor Enhanced Authentication Bypass Vulnerability
Original release date: January 21, 2016
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
Independent researcher Maxim Rupp has identified an authorization bypass
vulnerability in CARELs PlantVisor application. CAREL has confirmed that this
vulnerability refers to the phased-out CAREL product PlantVisorEnhanced and is
no longer supported.
This vulnerability could be exploited remotely.
AFFECTED PRODUCTS
CAREL reports that the vulnerability affects the following versions:
PlantVisorEnhanced.
IMPACT
An attacker or unauthorized user can refer to the particular file and thus
bypass authorization.
Impact to individual organizations depends on many factors that are unique to
each organization. NCCIC/ICS-CERT recommends that organizations evaluate the
impact of this vulnerability based on their operational environment,
architecture, and product implementation.
BACKGROUND
CAREL is an Italy-based company that maintains offices in four countries
around the world.
The affected product, PlantVisorEnhanced, is a web-based SCADA system.
According to CAREL, PlantVisorEnhanced is deployed across several sectors
including Commercial Facilities, Critical Manufacturing, and Energy. CAREL
estimates that these products are used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
INPUT VALIDATION [a]
As this vulnerability affects Internet Protocol-connected devices, an
unauthorized user can refer to the particular file and thus bypass
authorization.
CVE-2015-0867 [b] has been assigned to this vulnerability. A CVSS v3 base score
of 7.5 the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). [c]
VULNERABILITY DETAILS
EXPLOITABILITY
This vulnerability could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target this vulnerability.
DIFFICULTY
An attacker with a low skill would be able to exploit this vulnerability.
MITIGATION
PlantVisorEnhanced was replaced by PlantVisorPRO (new model) in 2007. Users
should contact pvcustomercare@carel.com (link sends e-mail) in order to
receive the necessary files and details on how to perform the installation to
avoid further security issues.
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 Virtual Private
Networks (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-20: Improper Input Validation,
http://cwe.mitre.org/data/definitions/20.html, web site last accessed January
21. 2016.
b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0867, web
site last accessed January 21. 2016.
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 January 21. 2016.
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.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=VudM
-----END PGP SIGNATURE-----