U.S. Flag Official website of the Department of Homeland Security
U.S. Department of Homeland Security Seal. ICS-CERT. Industrial Control Systems Cyber Emergency Response Team.
TLP:WHITE

Advisory (ICSA-16-026-01)

MICROSYS PROMOTIC Memory Corruption Vulnerability

Original release date: January 26, 2016

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/.



OVERVIEW

Security researcher Praveen Darshanam of Versa Networks has identified a memory corruption vulnerability in the MICROSYS, spol. s r.o. PROMOTIC application. MICROSYS has produced a new version to mitigate this vulnerability. The researcher has tested the new version to validate that it resolves the vulnerability.

AFFECTED PRODUCTS

MICROSYS reports that the vulnerability affects the following versions of PROMOTIC:

  • PROMOTIC versions prior to version 8.3.11

IMPACT

Exploitation of this vulnerability requires user interaction. An attacker who successfully exploits this vulnerability may be able to crash the browser and possibly execute arbitrary code.

Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.

BACKGROUND

MICROSYS is a Czech-based company with headquarters in Ostrava.

The affected product, PROMOTIC, is a Microsoft Windows-based supervisory control and data acquisition (SCADA) human-machine interface (HMI) software programming suite for creating applications that monitor, control, and display technological processes. This suite also includes support for a web interface.

According to MICROSYS, PROMOTIC is deployed across several sectors including Critical Manufacturing, Energy, and Water and Wastewater Systems. The PROMOTIC system is primarily used in the Czech and Slovak Republics. It is also used in Poland, Hungary, Slovenia, Serbia, Bulgaria, and Romania.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

HEAP-BASED BUFFER OVERFLOWa

This vulnerability is exploited when a valid user runs malicious HTML code. This may happen if they are tricked by a phishing attack or another social engineering method into visiting a malicious web site hosting this code.

CVE-2016-0869b has been assigned to this vulnerability. A CVSS v3 base score of 5.0 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H).c

VULNERABILITY DETAILS

EXPLOITABILITY

This vulnerability is not exploitable remotely and cannot be exploited without user interaction. The exploit is only triggered when a local user runs the vulnerable application and loads the malformed HTML file.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

Crafting a working exploit for this vulnerability would be simple. Social engineering is required to convince the user to accept the malformed HTML file. This decreases the likelihood of a successful exploit.

MITIGATION

MICROSYS recommends that users with affected versions of PROMOTIC update their installations by downloading the latest version and installation instructions from the following MICROSYS web site:

http://www.promotic.eu/en/promotic/download/download.htm (link is external).

MICROSYS has produced a news release that contains additional information about new features and bug fixes for available stable and developmental PROMOTIC software versions:

http://www.promotic.eu/en/pmdoc/NewsPm803.htm#ver80311

ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks:

  • Do not click web links or open unsolicited attachments in email messages.
  • Refer to Recognizing and Avoiding Email Scamsd for more information on avoiding email scams.
  • Refer to Avoiding Social Engineering and Phishing Attackse for more information on social engineering attacks.

ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page at: http://ics-cert.us-cert.gov/content/recommended-practices. 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 web site (http://ics-cert.us-cert.gov/).

Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.


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?

The NCCIC continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.

Was this document helpful?  Yes  |  Somewhat  |  No

Back to Top