Security researcher Dillon Beresford of IXIA 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.
IMPACT
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.
BACKGROUND
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.
VULNERABILITY OVERVIEW
MEMORY CORRUPTION VULNERABILTIY: 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-2012-1804 has been assigned to this vulnerability. A CVSS V2 base score of 7.8 has also been assigned.
EXPLOITABILITY: This vulnerability is remotely exploitable.
EXISTENCE OF EXPLOIT: No known exploits specifically target this vulnerability.
DIFFICULTY: An attacker with a medium skill level would be able to exploit these vulnerabilities.
MITIGATION
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.
The full ICS-CERT advisory can be found here:
Source: http://www.us-cert.gov/control_systems/pdf/ICSA-12-131-01.pdf