Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.2547
Advisory (ICSA-17-283-01) LAVA Computer MFG Inc. Ether-Serial Link
11 October 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: LAVA Computer MFG Inc. Ether-Serial Link
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-14003
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-283-01
- --------------------------BEGIN INCLUDED TEXT--------------------
Advisory (ICSA-17-283-01)
LAVA Computer MFG Inc. Ether-Serial Link
Original release date: October 10, 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: Low skill level to exploit.
Vendor: LAVA Computer MFG Inc.
Equipment: Ether-Serial Link
Vulnerability: Authentication Bypass by Spoofing
AFFECTED PRODUCTS
The following versions of LAVA Computer MFG Inc.s Ether-Serial Links (ESL) are
affected:
All ESLs running firmware versions 6.01.00/29.03.2007 and prior versions.
IMPACT
Successful exploitation of this vulnerability could allow an attacker to spoof
the IP address of an authenticated user, assume the authenticated users
identity, and gain privileges or access to the system.
MITIGATION
LAVA Computer MFG Inc. has not responded to requests to work with
NCCIC/ICS-CERT to mitigate this vulnerability.
ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of this vulnerability. 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 this vulnerability. This
vulnerability is not remotely exploitable.
VULNERABILITY OVERVIEW
AUTHENTICATION BYPASS BY SPOOFING CWE-290
An improper authentication vulnerability has been identified, which, if
exploited, would allow an attacker with the same IP address to bypass
authentication by accessing a specific uniform resource locator.
CVE-2017-14003 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).
RESEARCHER
Maxim Rupp reported this vulnerability to ICS-CERT.
BACKGROUND
Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Ontario, Canada
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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=y9EJ
-----END PGP SIGNATURE-----