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AUSCERT External Security Bulletin Redistribution
ESB-2018.1535
RCE patched in Delta Electronics Delta Industrial Automation TPEditor
18 May 2018
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AusCERT Security Bulletin Summary
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Product: Delta Industrial Automation TPEditor
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-137-04
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Advisory (ICSA-18-137-04)
Delta Electronics Delta Industrial Automation TPEditor
Original release date: May 17, 2018
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/.
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1. EXECUTIVE SUMMARY
* CVSS v3 7.3
* ATTENTION: Exploitable remotely/low skill level to exploit
* Vendor: Delta Electronics
* Equipment: Delta Industrial Automation TPEditor
* Vulnerability: Heap-based Buffer Overflow
2. RISK EVALUATION
Successful exploitation of this vulnerability could crash the accessed device,
resulting in a buffer overflow condition that may allow remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Delta Industrial Automation TPEditor, a programming
software for Delta text panels operating on Windows, are affected:
* Delta Industrial Automation TPEditor, Version 1.89 or prior.
3.2 VULNERABILITY OVERVIEW
3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122
Parsing a malformed program file may cause heap-based buffer overflow
vulnerability, which may allow remote code execution.
CVE-2018-8871 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L
/I:L/A:L).
3.3 BACKGROUND
* Critical Infrastructure Sectors: Commercial Facilities, Communications,
Critical Manufacturing, Energy, Healthcare and Public Health
* Countries/Areas Deployed: Worldwide
* Company Headquarters Location: Taiwan
3.4 RESEARCHER
A security researcher (ThePotato) working with Trend Micro?s Zero Day
Initiative (ZDI) reported this vulnerability to NCCIC.
4. MITIGATIONS
Until Delta Electronics releases a new version of TPEditor, the company
suggests that affected users should restrict the interaction with the
application to trusted files.
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
* Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet.
* Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
* 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.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability.
Contact Information
For any questions related to this report, please contact the NCCIC at:
Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information: http://
ics-cert.us-cert.gov
or incident reporting: https://ics-cert.us-cert.gov/Report-Incident?
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