ESB-2018.0576 - [Win] Delta Electronics WPLSoft: Multiple vulnerabilities 2018-02-28

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             AUSCERT External Security Bulletin Redistribution

           Advisory (ICSA-18-058-02): Delta Electronics WPLSoft
                             28 February 2018


        AusCERT Security Bulletin Summary

Product:           Delta Electronics WPLSoft
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-7509 CVE-2018-7507 CVE-2018-7494

Original Bulletin:

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Advisory (ICSA-18-058-02)
Delta Electronics WPLSoft
Original release date: February 27, 2018

Legal Notice

All information products included in 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

CVSS v3 8.3

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Delta Electronics

Equipment: WPLSoft

Vulnerabilities: Stack-based Buffer Overflow, Heap-based Buffer Overflow,
Out-of-bounds Write.


The following versions of WPLSoft, a PLC programming software, are affected:

WPLSoft, Versions 2.45.0 and prior.


Successful exploitation of these vulnerabilities could allow remote code
execution or cause the software the attacker is accessing to crash.


Delta Electronics recommends affected users update their software to
the latest version of WPLSoft V2.46.0 that is available at the following
(link is external)

Additionally, Delta recommends users restrict the application's interaction
with trusted files.

NCCIC recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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 in the NCCIC Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT website.

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 these vulnerabilities.



The application utilizes a fixed length stack buffer where a value larger
than the buffer can be read from a file into the buffer, causing the
buffer to be overwritten, which may allow remote code execution or cause
the application to crash.

CVE-2018-7494 has been assigned to this vulnerability. A CVSS v3
base score of 8.3 has been assigned; the CVSS vector string is


The application utilizes a fixed length heap buffer where a value larger
than the buffer can be read from a file into the buffer, causing the
buffer to be overwritten, which may allow remote code execution or cause
the application to crash.

CVE-2018-7507 has been assigned to this vulnerability. A CVSS v3
base score of 8.3 has been assigned; the CVSS vector string is


The application writes data from a file outside the bounds of the intended
buffer space, which could cause memory corruption or may allow remote
code execution.

CVE-2018-7509 has been assigned to this vulnerability. A CVSS v3
base score of 8.3 has been assigned; the CVSS vector string is


Axt working with Trend Micro's Zero Day Initiative reported these
vulnerabilities to NCCIC.


Critical Infrastructure Sectors: Commercial Facilities, Critical
Manufacturing, Energy

Countries/Areas Deployed: Asia, Europe, United States

Company Headquarters Location: Taiwan

Contact Information

For any questions related to this report, please contact the NCCIC at:

Email: (link sends e-mail)
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:
or incident reporting:

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