ESB-2018.2115 - [Appliance] Echelon products: Multiple vulnerabilities 2018-07-20

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2115
             Advisory (ICSA-18-200-03): Echelon SmartServer 1,
            SmartServer 2, SmartServer 3, i.LON 100, i.LON 600
                               20 July 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Echelon SmartServer
                   Echelon i.LON
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Reduced Security         -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10627 CVE-2018-8859 CVE-2018-8855
                   CVE-2018-8851  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-200-03

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Advisory (ICSA-18-200-03)
Echelon SmartServer 1, SmartServer 2, SmartServer 3, i.LON 100, i.LON 600
Original release date: July 19, 2018

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/.

1. EXECUTIVE SUMMARY

CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: Echelon
Equipment: SmartServer 1, SmartServer 2, i.LON 100, i.LON 600
Vulnerabilities: Information Exposure, Authentication Bypass Using an
Alternate Path or Channel, Unprotected Storage of Credentials, Cleartext
Transmission of Sensitive Information

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow for remote
code execution on the device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Smart Server and i.LON products, which are network devices,
are affected:

SmartServer 1 all versions,
SmartServer 2 all versions prior to release 4.11.007,
i.LON 100 all versions, and
i.LON 600 all versions.


3.2 VULNERABILITY OVERVIEW

3.2.1    INFORMATION EXPOSURE CWE-200

An attacker can use the SOAP API to retrieve and change sensitive
configuration items such as the usernames and passwords for the Web and
FTP servers. This vulnerability does not affect the i.LON 600 product.

CVE-2018-10627 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.2    AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL CWE-288

An attacker can bypass the required authentication specified in the security
configuration file by including extra characters in the directory name
when specifying the directory to be accessed. This vulnerability does not
affect the i.LON 600 product.

CVE-2018-8859 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.3    UNPROTECTED STORAGE OF CREDENTIALS CWE-256

The devices store passwords in plaintext, which may allow an attacker
with access to the configuration file to log into the SmartServer web
user interface.

CVE-2018-8851 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.4    CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319

The devices allow unencrypted Web connections by default, and devices can
receive configuration and firmware updates by unsecure FTP.

CVE-2018-8855 has been assigned to this vulnerability. A CVSS v3
base score of 9.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
Manufacturing, Information Technology
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: Santa Clara, California

3.4 RESEARCHER

Echelon, working with Daniel Crowley and IBM's X-Force Red team,
self-reported these vulnerabilities to NCCIC.
4. MITIGATIONS

Echelon recommends that affected users install SmartServer 2 Service
Pack 7 (Version 4.11.007), to mitigate CVE-2018-8859, CVE-2018-8851,
and CVE-2018-8855, which can be downloaded at the following link:

https://www.echelon.com/software-downloads?ele=153-0608-01A

The following manual mitigation is also recommended:

For CVE-2018-10627, Echelon recommends affected users modify the
WebParams.dat file.

Echelon recommends that the following mitigation is implemented until
SmartServer 2 Service Pack 7 is installed:

All SmartServer and i.LON 600 devices along with any servers using the
SmartServer and i.Lon services should be installed behind a firewall or
on a VLAN without other devices.
Change the username and password during the initial installation of the
affected products.
Disable unencrypted services and secure encrypted services for the
SmartServer or i.LON 100.

NCCIC recommends 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.

NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.

NCCIC 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 on the ICS-CERT website in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies.

Organizations observing any suspected malicious activity should follow
their established internal procedures and report their findings to NCCIC
for tracking and correlation against other incidents.

NCCIC also recommends that users take the following measures to protect
themselves from social engineering attacks:

Do not click web links or open unsolicited attachments in email messages.
Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.

No known public exploits specifically target these vulnerabilities.

Contact Information

For any questions related to this report, please contact the NCCIC at:

Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:
http://ics-cert.us-cert.gov
or incident reporting:  https://ics-cert.us-cert.gov/Report-Incident?

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