This advisory was originally posted to the US-CERT secure Portal library on February 25, 2016, and is being released to the NCCIC/ICS-CERT web site.
Ivan Sanchez from Nullcode Team has identified an access violation memory error in Rockwell Automation’s Integrated Architecture Builder (IAB) application. Rockwell Automation has produced a software update to mitigate this vulnerability.
The following IAB versions are affected:
A successful attack would allow an attacker to execute malicious code on the target computer at the same privilege level as the IAB tool.
Impact to individual organizations depends on many factors that are unique to each organization. ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.
Rockwell Automation, which is a US-based company, provides industrial automation control and information products worldwide across a wide range of industries.
The affected product, IAB, is used to configure Logix-based automation systems used in industrial control systems. According to Rockwell Automation, IAB is deployed across several sectors including Critical Manufacturing, Energy, and Water and Wastewater Systems. Rockwell Automation estimates that the product is used globally.
Execution of a maliciously crafted or altered project file can allow the execution of unknown code on the affected computer. If successful, such unknown code will run at the same privilege level as the user who is logged into the machine.
CVE-2016-2277b has been assigned to this vulnerability. A CVSS v3 base score of 6.3 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H).c
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 project file.
No known public exploits specifically target this vulnerability.
Crafting a working exploit for this vulnerability would be difficult. Social engineering is required to convince the user to introduce or replace project files. Additional user interaction is needed to load the malformed file. This decreases the likelihood of a successful exploit.
Rockwell Automation recommends users upgrade to the newest available software versions to mitigate the threat of this vulnerability. They also recommend the following steps:
Rockwell Automation’s security notification is available at the following URL, with a valid account:
For more information on this vulnerability and more detailed mitigation instructions, please see Rockwell Automation’s public security web page at:
ICS-CERT recommends that users take the following measures to protect themselves from 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.