Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.2339
Advisory (ICSA-17-257-01) LOYTEC LVIS-3ME
15 September 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: LVIS-3ME
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Existing Account
Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-13998 CVE-2017-13996 CVE-2017-13994
CVE-2017-13992
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-257-01
- --------------------------BEGIN INCLUDED TEXT--------------------
Advisory (ICSA-17-257-01)
LOYTEC LVIS-3ME
Original release date: September 14, 2017
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/.
CVSS v3 8.1
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: LOYTEC
Equipment: LVIS-3ME
Vulnerabilities: Relative Path Traversal, Insufficient Entropy, Cross-site
Scripting, Insufficiently Protected Credentials
AFFECTED PRODUCTS
The following versions of LVIS-3ME, an HMI Touch Panel, are affected:
LVIS-3ME versions prior to 6.2.0
IMPACT
Successful exploitation of these vulnerabilities may result in information
exposure or allow arbitrary code execution.
MITIGATION
LOYTEC has released a firmware update, V6.2.0, to address these
vulnerabilities. LOYTEC recommends that users update to the latest firmware
update which is available by accessing an account at the following location:
https://www.loytec.com/support/download/ (link is external)
NCCIC/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. 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.
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.
In addition, ICS-CERT recommends that users take the following measures to
protect themselves from social engineering attacks:
1.Do not click web links or open unsolicited attachments in email messages.
2.Refer to Recognizing and Avoiding Email Scamsfor more information on
avoiding email scams.
3.Refer to Avoiding Social Engineering and Phishing Attacksfor more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities. These
vulnerabilities are remotely exploitable. Low skill level is needed to
exploit.
VULNERABILITY OVERVIEW
RELATIVE PATH TRAVERSAL CWE-23
The web user interface fails to prevent access to critical files that non
administrative users should not have access to, which could allow an attacker
to create or modify files or execute arbitrary code.
CVE-2017-13996 has been assigned to this vulnerability. A CVSS v3 base score
of 7.6 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L).
INSUFFICIENT ENTROPY CWE-331
The application does not utilize sufficiently random number generation for the
web interface authentication mechanism, which could allow remote code
execution.
CVE-2017-13992 has been assigned to this vulnerability. A CVSS v3 base score
of 8.1 has been assigned; the CVSS vector string is
(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
The web interface lacks proper web request validation, which could allow XSS
attacks to occur if an authenticated user of the web interface is tricked into
clicking a malicious link.
CVE-2017-13994 has been assigned to this vulnerability. A CVSS v3 base score
of 7.6 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L).
INSUFFICIENTLY PROTECTED CREDENTIALS CWE-522
The application does not sufficiently protect sensitive information from
unauthorized access.
CVE-2017-13998 has been assigned to this vulnerability. A CVSS v3 base score
of 7.5 has been assigned; the CVSS vector string is
(AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
RESEARCHER
Davy Douhine of RandoriSec reported the vulnerabilities to ICS-CERT.
BACKGROUND
Critical Infrastructure Sectors: Critical Manufacturing, Energy
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Austria
- --------------------------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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=VwK+
-----END PGP SIGNATURE-----