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AUSCERT External Security Bulletin Redistribution
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
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2017-14003
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LAVA Computer MFG Inc. Ether-Serial Link
Original release date: October 10, 2017
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CVSS v3 8.1
ATTENTION: Low skill level to exploit.
Vendor: LAVA Computer MFG Inc.
Equipment: Ether-Serial Link
Vulnerability: Authentication Bypass by Spoofing
The following versions of LAVA Computer MFG Inc.s Ether-Serial Links (ESL) are
All ESLs running firmware versions 6.01.00/29.03.2007 and prior versions.
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.
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.
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
Maxim Rupp reported this vulnerability to ICS-CERT.
Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Ontario, Canada
For any questions related to this report, please contact ICS-CERT at:
Email: firstname.lastname@example.org (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
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
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