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Security researcher Dillon Beresford of IXIA1 has identified a memory corruption vulnerability in the Progea Movicon application. This vulnerability can be exploited by a remote attacker; however, no public exploits are currently known to exist.
ICS-CERT has coordinated these vulnerabilities with Progea, which has produced a new version (V11.3) that resolves the reported vulnerability. Mr. Beresford has tested the new version and confirms that it resolves the vulnerability.
Progea reports that the following products are affected:
- Movicon versions prior to 11.3.
An attacker can cause the server to read an invalid memory address resulting in a denial of service.
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.
Progea Srl is an Italian company that offers SCADA products that are deployed primarily in Europe, India, and the United States. They are used in energy, water, critical manufacturing, and several other industry sectors.
Movicon 11 is an XML-based human-machine interface development system that includes drivers for programmable logic controllers (PLCs). Movicon provides OPC-based connectivity for data transfer, including OPC DA and OPC XML DA services.
Memory Corruption Vulnerability2
Movicon is affected by an out-of-bounds read vulnerability that can be exploited by sending a specially crafted HTTP POST request to the Movicon OPC server (default Port 9090/TCP). The request will result in a denial of service.
CVE-2012-18043 has been assigned to this vulnerability. A CVSS V2 base score of 7.8 has also been assigned.
This vulnerability is remotely exploitable.
Existence of Exploit
No known exploits specifically target this vulnerability.
An attacker with a medium skill level would be able to exploit these vulnerabilities.
To resolve this issue, Progea recommends installing the new version of Movicon. Users can download the new version at http://www.progea.com/en-us/downloads/programs.aspx; registration is required to access the new version.
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.
The Control Systems Security Program (CSSP) also provides a section for control systems security recommended practices on the CSSP web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to taking defensive measures.
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. http://www.ixiacom.com/, website last accessed May 10, 2012.
- 2. http://cwe.mitre.org/data/definitions/119.html, this website was last accessed May 10, 2012.
- 3. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-1804. NIST uses this advisory to create the CVE website report. This website will be active sometime after publication of this advisory.”
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