ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Rockwell Automation
Equipment: FactoryTalk Alarms and Events
Vulnerability: Improper Input Validation
The following versions of FactoryTalk Alarms and Events, a component of the Factory Talk Services Platform, are affected:
FactoryTalk Alarms and Events is used in the following Rockwell Automation products:
Successful exploitation of this vulnerability may allow an attacker to cause a denial of service condition in the in the history archiver service running on FactoryTalk Alarms and Events.
Rockwell Automation recommends upgrading to the latest version of FactoryTalk Alarms and Events, Version 2.90 or later, and applying available patches, which can be obtained at the following location:
FactoryTalk Alarm and Event history is logged using the Rockwell Alarm Historian service using Port 403, writing alarms and events to the user-configured SQL Server database. If the Rockwell Automation Alarm Historian service is on the same machine as the Rockwell Alarm Event service, then Port 403 can be blocked remotely as the historical information is being logged to the local host rather than a remote host. Any other machine in the system that does not have the Rockwell Alarm Historian service on the same machine as the Rockwell Alarm Event service will require access to Port 403. However, FactoryTalk View SE clients using the Alarm and Event Log Viewer to view FactoryTalk Alarm and Event history do not require Port 403, and can thus be blocked.
Rockwell Automation recommends that users who are unable to update and apply available patches should pursue risk mitigation strategies provided below. In addition, users are encouraged, when possible, to combine these strategies with the general security guidelines.
Rockwell Automation’s security notification is available at the following URL with a valid account (sign-in required):
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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. 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.
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.
No known public exploits specifically target this vulnerability.
An unauthenticated attacker with remote access to a network with FactoryTalk Alarms and Events can send a specially crafted set of packets packet to Port 403/TCP (the history archiver service), causing the service to either stall or terminate.
A major Oil and Gas company reported this vulnerability to ICS-CERT.
Critical Infrastructure Sectors: Chemical, Critical Manufacturing, Food and Agriculture, Water and Wastewater Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Milwaukee, Wisconsin