Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.1305
Multiple stack-based overflow vulnerabilities in Delta
Electronics PMSoft, a software development tool
27 April 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Delta Electronics PMSoft
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Denial of Service -- Remote with User Interaction
Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-8839
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-116-01
- --------------------------BEGIN INCLUDED TEXT--------------------
Advisory (ICSA-18-116-01)
Delta Electronics PMSoft
Original release date: April 26, 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/.
1. EXECUTIVE SUMMARY
o CVSS v3 7.1
o ATTENTION: Low skill level to exploit.
o Vendor: Delta Electronics
o Equipment: PMSoft
o Vulnerabilities: Multiple Stack-Based Buffer Overflow vulnerabilities
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could cause the application to
crash; stack-based buffer overflow conditions may allow arbitrary code
execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of PMSoft, a software development tool for motion
controllers, are affected:
o PMSoft v 2.10 or prior.
3.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
The application has multiple stack-based buffer overflow vulnerabilities where
a .ppm file can introduce a value larger than is readable by PMSoft's
fixed-length stack buffer. This can cause the buffer to be overwritten, which
may allow arbitrary code execution or cause the application to crash.
CVE-2018-8839 has been assigned to these vulnerabilities. A CVSS v3 base score
of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/
C:N/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
Ghirmay Desta, working with Trend Micro's Zero Day Initiative, reported these
vulnerabilities to NCCIC.
4. MITIGATIONS
Delta Electronics recommends affected users update to at least PMSoft v2.11,
which was made available as of March 22, 2018, or the latest available version.
This update can be found for download at the following location:
http://www.deltaww.com/Products/PluginWebUserControl/
downloadCenterCounter.aspx?DID=2092&DocPath=1&hl=en-US
NCCIC recommends that users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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.
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 ICS-CERT 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.
NCCIC also recommends that 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.
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?
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=QxxG
-----END PGP SIGNATURE-----