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AUSCERT External Security Bulletin Redistribution
ESB-2021.0680
(icsa-21-054-03) Advantech Spectre RT Industrial Routers
24 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Advantech Spectre RT Industrial Routers
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Root Compromise -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-18235 CVE-2019-18233 CVE-2019-18231
CVE-2018-20679 CVE-2016-6304 CVE-2016-6301
CVE-2016-2842 CVE-2016-0799 CVE-2015-9261
Reference: ESB-2016.1154
ESB-2016.0547
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-054-03
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ICS Advisory (ICSA-21-054-03)
Advantech Spectre RT Industrial Routers
Original release date: February 23, 2021
Legal Notice
All information products included in https://us-cert.cisa.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://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 10.0
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Advantech
o Equipment: Spectre RT Industrial Routers
o Vulnerabilities: Improper Neutralization of Input During Web Page
Generation, Cleartext Transmission of Sensitive Information, Improper
Restriction of Excessive Authentication Attempts, Use of a Broken or Risky
Cryptographic Algorithm, Use of Platform-Dependent Third-party Components
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow information
disclosure, deletion of files, and remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Advantech Spectre RT Industrial Routers are affected:
o Spectre RT ERT351 firmware Versions 5.1.3 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION CWE-79
The affected product does not neutralize special characters in the error
response, allowing attackers to use a reflected XSS attack.
CVE-2019-18233 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:N/I:L/A:N ).
3.2.2 CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319
Login and password are transmitted in clear text form, which may allow an
attacker to intercept the request.
CVE-2019-18231 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:N/A:N ).
3.2.3 IMPROPER RESTRICTION OF EXCESSIVE AUTHENTICATION ATTEMPTS CWE-307
Insufficient login authentication parameters required for the web application
may allow an attacker to gain full access using a brute-force password attack.
CVE-2019-18235 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 USE OF A BROKEN OR RISKY CRYPTOGRAPHIC ALGORITHM CWE-327
Outdated version of BusyBox password encryption is in use, which may allow an
attacker to discover passwords.
CVE-2018-20679 , CVE-2016-6301 , CVE-2015-9261 , and others have been assigned
to this version of BusyBox. A CVSS v3 base score of 7.5 has been calculated;
the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ).
3.2.5 USE OF PLATFORM-DEPENDENT THIRD-PARTY COMPONENTS CWE-1103
Outdated version of OpenSSL is in use, which may allow an attacker to exploit
known vulnerabilities in OpenSSL.
CVE-2016-2842 , CVE-2016-0799 , CVE-2016-6304 and others have been assigned to
this version of OpenSSL. A CVSS v3 base score of 10.0 has been calculated; the
CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and
Wastewater Systems
o COUNTRIES/AREAS DEPLOYED: East Asia, Europe, United States, South America,
Middle East
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Ilya Karpov and Evgeniy Druzhinin of Rostelecom-Solar and Vlad Komarov of
ScadaX reported these vulnerabilities to CISA.
4. MITIGATIONS
For additional information, please see Advantech Security Advisory
SA-2021-01-01
Advantech recommends users update to Version 6.2.7 or later.
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 VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize a 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.cisa.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.cisa.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.
No known public exploits specifically target these vulnerabilities.
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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