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AUSCERT External Security Bulletin Redistribution
ESB-2019.3443
Multiple vulnerabilities have been identified in Delta Electronics TPEditor
11 September 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Delta Electronics TPEditor
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-13544 CVE-2019-13540 CVE-2019-13536
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-253-01
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ICS Advisory (ICSA-19-253-01)
Delta Electronics TPEditor
Original release date: September 10, 2019
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
o CVSS v3 7.8
o ATTENTION: Low skill level to exploit
o Vendor: Delta Electronics
o Equipment: TPEditor
o Vulnerabilities: Stack-based Buffer Overflow, Heap-based Buffer Overflow,
Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow information
disclosure, remote code execution, or may 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 1.94 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
Multiple stack-based buffer overflow vulnerabilities may be exploited by
processing specially crafted project files, which may allow an attacker to
remotely execute arbitrary code.
CVE-2019-13540 has been assigned to these vulnerabilities. A CVSS v3 base score
of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U
/C:H/I:H/A:H ).
3.2.2 HEAP-BASED BUFFER OVERFLOW CWE-122
Multiple heap-based buffer overflow vulnerabilities may be exploited by
processing specially crafted project files, which may allow an attacker to
remotely execute arbitrary code.
CVE-2019-13536 has been assigned to these vulnerabilities. A CVSS v3 base score
of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U
/C:H/I:H/A:H )
3.2.3 OUT-OF-BOUNDS WRITE CWE-787
Multiple out-of-bounds write vulnerabilities may be exploited by processing
specially crafted project files, which may allow remote code execution.
CVE-2019-13544 has been assigned to these vulnerabilities. A CVSS v3 base score
of 7.8 has been calculated; 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
kimiya of 9sg Security Team working with Trend Micro's Zero Day Initiative
(ZDI) reported these vulnerabilities to CISA.
4. MITIGATIONS
Delta Electronics recommends affected users update to the latest version of
Delta Industrial Automation TPEditor, Version 1.95, which is available for
download at:
http://www.deltaww.com/services/DownloadCenter2.aspxsecID=8&pid=2&tid=0&CID=06
&itemID=060302&typeID=1&downloadID=&title=&dataType=8;&check=1&hl=en-US
Delta Electronics also recommends affected users restrict the interaction with
the application to trusted files.
CISA 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.
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.
No known public exploits specifically target these vulnerabilities. These
vulnerabilities are not exploitable remotely.
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