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AUSCERT External Security Bulletin Redistribution
ESB-2021.0469
Advisory (icsa-21-040-02) Advantech iView
10 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Advantech iView
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Increased Privileges -- Existing Account
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22658 CVE-2021-22656 CVE-2021-22654
CVE-2021-22652
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02
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ICS Advisory (ICSA-21-040-02)
Advantech iView
Original release date: February 09, 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 9.8
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Advantech
o Equipment: iView
o Vulnerabilities: SQL Injection, Path Traversal, Missing Authentication for
Critical Function
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow an attacker to
disclose information, escalate privileges to Administrator, perform an
arbitrary file read, and remotely execute commands.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Advantech iView, a device management application, are
affected:
o iView versions prior to v5.7.03.6112
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
The affected product is vulnerable to a SQL injection, which may allow an
unauthorized attacker to disclose information.
CVE-2021-22654 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 ).
3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
The affected product is vulnerable to a SQL injection, which may allow an
attacker to escalate privileges to 'Administrator'.
CVE-2021-22658 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 ).
3.2.3 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH
TRAVERSAL') CWE-22
The affected product is vulnerable to directory traversal, which may allow an
attacker to read sensitive files.
CVE-2021-22656 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 ).
3.2.4 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
Access to the affected product's configuration is missing authentication, which
may allow an unauthorized attacker to change the configuration and obtain code
execution.
CVE-2021-22652 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
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and
Wastewater Systems
o COUNTRIES/AREAS DEPLOYED: East Asia, Europe, United States
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Anonymous and rgod, working with Trend Micro's Zero Day Initiative, and William
Vu of Rapid7 reported these vulnerabilities to CISA.
4. MITIGATIONS
Advantech has released Version 5.7.03.6112 of iView to address these reported
vulnerabilities. Users can download the latest version of iView .
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.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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