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This advisory provides mitigation details for a vulnerability in the Canary Labs, Inc. Trend Link software.
Researcher Kuang-Chun Hung of Security Research and Service Institute−Information and Communication Security Technology Center (ICST) has identified an insecure ActiveX control method vulnerability in Canary Labs, Inc. Trend Link ActiveX control. Canary Labs, Inc. has updated Trend Link, and Kuang-Chun Hung has tested the patch and verified that it mitigates the vulnerability. If exploited, an attacker could influence the paths or file names that are used in the software application. This could affect systems using Trend Link in the critical manufacturing and energy sectors in the United States, South America, and Europe.
This vulnerability could be exploited remotely.
Canary Lab, Inc. reports that the vulnerabilities affect the following products:
- Trend Link Versions 126.96.36.199051 and prior.
Successful exploit of this vulnerability could result in a denial of service (DoS) or remote code execution.
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.
Canary Labs, Inc. is a US-based company that has products deployed in 24 countries, including the United States, South America, and Europe.
The affected product, Trend Link,1 is a trending application that can be used in SCADA systems. According to Canary Labs, Inc., these products are deployed across several sectors including the critical manufacturing and energy sectors.
Insecure ActiveX Control Method2
Trend Link uses an ActiveX control that contains an insecure ActiveX control method. This control is loaded from “TrendDisplay.dll,” and contains a method called “SaveToFile” that allows users to save arbitrary files to any location on the server hosting the control. This vulnerability could result in a DoS or allow remote code execution.
This vulnerability can be exploited remotely.
Existence of Exploit
No known public exploits specifically target this vulnerability.
An attacker with medium skill could exploit this vulnerability.
Canary Labs, Inc. has published a customer notification concerning this vulnerability. Trend Link customers who wish to obtain the update and instructions on how to apply it should contact Canary Labs product support:
ICS‑CERT encourages asset owners to take additional defensive measures to protect against this and other cybersecurity risks.
- Minimize network exposure for all control system devices. Critical devices should not directly face 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 VPN is only as secure as the connected devices.
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.6 ICS‑CERT reminds organizations to perform proper impact analysis and risk assessment prior to taking defensive measures.
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.7
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.
- 1. Canary Labs, Inc. Trend Link, http://www.canarylabs.com/software/canary-trend-link, Web site last accessed April 08, 2013.
- 2. CWE-73: External Control of File Name or Path, http://cwe.mitre.org/data/definitions/73.html, Web site last accessed April 08, 2013.
- 3. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-3022, NIST uses this advisory to create the CVE Web site report. This Web site will be active sometime after publication of this advisory.
- 4. CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=(AV:N/AC:M/Au:S/C:N/I:C/A:C), Web site last accessed April 08, 2013.
- 5. Canary Labs Product Support, http://www.canarylabs.com/services-and-support/product-support, Web site last accessed April 08, 2013.
- 6. CSSP Recommended Practices, http://www.us-cert.gov/control_systems/practices/Recommended_Practices.html, Web site last accessed April 08, 2013.
- 7. Targeted Cyber Intrusion Detection and Mitigation Strategies, http://www.us-cert.gov/control_systems/pdf/ICS-TIP-12-146-01B.pdf, Web site last accessed April 08, 2013.
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