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AUSCERT External Security Bulletin Redistribution
ESB-2020.2211
Advisory (icsa-20-177-01) ENTTEC Lighting Controllers
26 June 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: ENTTEC Lighting Controllers
Publisher: US-CERT
Operating System: Network Appliance
Impact/Access: Modify Arbitrary Files -- Existing Account
Cross-site Scripting -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2019-12777 CVE-2019-12776 CVE-2019-12775
CVE-2019-12774
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-20-177-01
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ICS Advisory (ICSA-20-177-01)
ENTTEC Lighting Controllers
Original release date: June 25, 2020
Legal Notice
All information products included in https://us-cert.gov/ics 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 https://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.8
o ATTENTION: Exploitable remotely/low skill level to exploit/public exploits
are available
o Vendor: ENTTEC
o Equipment: Datagate Mk2, Storm 24, Pixelator, E-Streamer Mk2
o Vulnerabilities: Use of Hard-coded Cryptographic Key, Cross-site Scripting,
Improper Access Control, Incorrect Permission Assignment for Critical
Resource
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
gain unauthorized SSH/SCP access to devices, inject malicious code, run
commands with root privileges, and read, write, and execute files in system
directories as any user.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
ENTTEC reports these vulnerabilities affect firmware Version
70044_update_05032019-482 and prior for the following lighting control
products:
o Datagate Mk2
o Storm 24
o Pixelator
o E-Streamer Mk2
3.2 VULNERABILITY OVERVIEW
3.2.1 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
The lighting controller products include hard-coded SSH keys for remote SSH and
SCP access as the root user.
CVE-2019-12776 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:H/I:H/A:H ).
3.2.2 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
Several stored XSS vulnerabilities have been identified in ENTTEC's Datagate
Mk2 web configuration software, which could allow an unauthenticated threat
actor to inject malicious code directly into the application.
CVE-2019-12774 has been assigned to these vulnerabilities. A CVSS v3 base score
of 6.1 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:C
/C:L/I:L/A:N ).
3.2.3 IMPROPER ACCESS CONTROL CWE-284
The lighting controller products enable high privileged root access via sudo
capability without requiring appropriate access control.
CVE-2019-12775 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:H/I:H/A:H ).
3.2.4 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732
The system replaces permissions by the underlying operating system with highly
insecure read, write, and execute directory permissions for all users.
CVE-2019-12777 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Australia
3.4 RESEARCHER
Mark Cross reported these vulnerabilities to CISA.
4. MITIGATIONS
ENTTEC is looking into these vulnerabilities but has not yet released updated
software. They recommend devices should be located behind appropriate firewalls
and network controls, and not accessible from the Internet.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.gov . 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 webpage on us-cert.gov 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 CISA for tracking
and correlation against other incidents.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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