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AUSCERT External Security Bulletin Redistribution
Koyo ECOM100 Ethernet Module : Multiple Vulnerabilities.
25 January 2012
AusCERT Security Bulletin Summary
Product: Koyo ECOM100 Ethernet Module
Publisher: Industrial Control Systems Cyber Emergency Response Team
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Unauthorised Access -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
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ICS-ALERT-12-020-05Ã¢Â€Â”KOYO ECOM100 MULTIPLE VULNERABILITIES
January 20, 2012
ICS-CERT is aware of a public report of multiple vulnerabilities with
proof-of-concept (PoC) exploit code affecting the Koyo ECOM100 Ethernet
Module. This module is used to communicate between a PLC and the control
system. This report is based on information presented by Reid Wightman during
Digital Bonds SCADA Security Scientific Symposium (S4) on January19, 2012.
Vulnerability details were released without coordination with either the
vendor or ICS-CERT.
ICS-CERT is attempting to notify the affected vendor of
the report to ask the vendor to confirm the vulnerabilities and identify
mitigations. ICS-CERT is issuing this alert to provide preliminary notice of
the reported vulnerable products and to begin identifying baseline mitigations
that can reduce the risk of cybersecurity attacks exploiting these
vulnerabilities. The report included vulnerability details and PoC exploit
code for the following vulnerabilities:
Vulnerability Type Exploitability Impact
Weak Authentication Remote Loss of Integrity
Uses 8-byte passcode Remote Loss of Integrity
Replay Attack Remote Loss of Integrity
Web Server No Authentication Remote Open Authentication/Loss of Integrity
Web Server Buffer Overflow Remote Denial of Service
Web Server Cross-Site Scripting Remote Loss of Integrity
Resource Exhaustion Remote Denial of Service and Web Server Crash
Please report any issues affecting control systems in critical infrastructure
environments to ICS-CERT.
ICS-CERT is currently coordinating with Koyo and the security researcher to
identify useful mitigations.
ICS-CERT recommends that users take defensive measures to minimize the risk
of exploitation of these vulnerabilities. Specifically, users should:
Ã¢Â€Â¢ Minimize network exposure for all control system devices. Control system
devices should not directly face the Internet.
Ã¢Â€Â¢ Locate control system networks and devices behind firewalls, and isolate
them from the business network.
Ã¢Â€Â¢ If remote access is required, employ secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPN is only as secure as the connected devices.
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment
prior to taking defensive measures.
The Control Systems Security Program (CSSP) also provides a recommended practices
section for control systems on the US-CERT website. Several recommended practices
are available for reading or download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies. Organizations that observe
any suspected malicious activity should follow their established internal
procedures and report their findings to ICS-CERT for tracking and correlation
against other incidents.
ICS -CERT CONTACT
ICS-CERT Operations Center
For CSSP Information and Incident Reporting: www.ics-cert.org
a. ICS-CERT ALERT, http://www.us-cert.gov/control_systems/pdf/ICS-Alert-10-301-01.pdf,
website last accessed January 20, 2012
b. Control System Security Program (CSSP) Recommended Practices,
website last accessed January 20, 2012.
What is an ICS-CERT Alert? An ICS-CERT Alert is intended to provide timely
notification to critical infrastructure owners and operators concerning threats
or activity with the potential to impact critical infrastructure computing
When is vulnerability attribution provided to researchers? Attribution for
vulnerability discovery is always provided to the vulnerability reporter
unless the reporter notifies ICS-CERT that they wish to remain anonymous.
ICS-CERT encourages researchers to coordinate vulnerability details before
public release. The public release of vulnerability details prior to the
development of proper mitigations may put industrial control systems and the
public at avoidable risk.
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