CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
97.0%
HP’s Zero Day Initiative (ZDI) reports that independent researcher Ariele Caltabiano has identified a stack-based buffer overflow vulnerability in the Moxa VPort ActiveX SDK Plus application. Moxa has produced an update that mitigates this vulnerability.
This vulnerability could be exploited remotely.
The following Moxa VPort ActiveX SDK products (all versions prior to Version 2.8) are affected:
Successful exploitation of this vulnerability may allow remote attackers to execute arbitrary code at the same privilege level at which VPort was running.
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.
Moxa is a Taiwan-based company that maintains offices in several countries around the world, including the US, UK, India, Germany, France, China, and Brazil.
The affected products, Moxa VPort, is a family of camera, recorder, and encoders. ActiveX Control is an OCX component that uses Microsoft COM (Component Object Model) technology to enable software components to communicate. ActiveX is found in VB, VC, and C# developing environments, as well as plug-ins for web applications and automation tools (e.g., SCADA software). According to Moxa, VPort ActiveX SDK products are deployed across all 16 sectors. Moxa estimates that these products are used primarily in the United States and Europe with a small percentage in Asia.
A function in ActiveX has a Stack-Based Buffer Overflow vulnerability. Successful exploitation of this vulnerability may allow insertion of lines of assembly code such as a call to another tool.
CVE-2015-0986NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0986, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. has been assigned to this vulnerability. ZDI has assigned a CVSS v2 base score of 7.5; the CVSS vector string is (AV:N/AC:L/Au:N/C:P/I:P/A:P).CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:P/I:P/A:P, web site last accessed April 07, 2015.
This vulnerability could be exploited remotely.
No known public exploits specifically target this vulnerability.
An attacker with a low skill would be able to craft a working exploit for this vulnerability.
Moxa has produced an update that mitigates this vulnerability.
<http://www.moxa.com/support/download.aspx?d_id=2114>
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 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.
www.moxa.com/support/download.aspx?d_id=2114
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