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AUSCERT External Security Bulletin Redistribution
ESB-2020.2718
Advisory (icsa-20-219-04) Delta Industrial Automation TPEditor
7 August 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: https://us-cert.cisa.gov/ics/advisories/icsa-20-219-04
Publisher: US-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Modify Arbitrary Files -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-16227 CVE-2020-16225 CVE-2020-16223
CVE-2020-16221 CVE-2020-16219
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-219-04
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ICS Advisory (ICSA-20-219-04)
Delta Industrial Automation TPEditor
Original release date: August 06, 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 7.8
o ATTENTION: Low skill level to exploit
o Vendor: Delta Electronics
o Equipment: https://us-cert.cisa.gov/ics/advisories/icsa-20-219-04
o Vulnerabilities: Out-of-bounds Read, Stack-based Buffer Overflow,
Heap-based Buffer Overflow, Write-what-where Condition, Improper Input
Validation
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
read/modify information, execute arbitrary code, and/or crash the application.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of TPEditor, a programming software for Delta text
panels, are affected:
o TPEditor Versions 1.97 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS READ CWE-125
An out-of-bounds read may be exploited by processing specially crafted project
files. Successful exploitation of this vulnerability may allow an attacker to
read/modify information, execute arbitrary code, and/or crash the application.
CVE-2020-16219 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.2 STACK-BASED BUFFER OVERFLOW CWE-121
A stack-based buffer overflow may be exploited by processing a specially
crafted project file. Successful exploitation of this vulnerability may allow
an attacker to read/modify information, execute arbitrary code, and/or crash
the application.
CVE-2020-16221 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.3 HEAP-BASED BUFFER OVERFLOW CWE-122
A heap-based buffer overflow may be exploited by processing a specially crafted
project file. Successful exploitation of this vulnerability may allow an
attacker to read/modify information, execute arbitrary code, and/or crash the
application.
CVE-2020-16223 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.4 WRITE-WHAT-WHERE CONDITION CWE-123
A write-what-where condition may be exploited by processing a specially crafted
project file. Successful exploitation of this vulnerability may allow an
attacker to read/modify information, execute arbitrary code, and/or crash the
application.
CVE-2020-16225 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.5 IMPROPER INPUT VALIDATION CWE-20
An improper input validation may be exploited by processing a specially crafted
project file not validated when the data is entered by a user. Successful
exploitation of this vulnerability may allow an attacker to read/modify
information, execute arbitrary code, and/or crash the application.
CVE-2020-16227 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Kdot, kimiya of 9SG Security Team, Justin Taft and Chris Anastasio working with
Trend Micro's Zero Day Initiative reported these vulnerabilities to CISA.
4. MITIGATIONS
Delta Electronics recommends affected users update to the latest version of
Delta Industrial Automation TPEditor, Version 1.98
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities. These
vulnerabilities are not exploitable remotely.
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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