PT-2014-20: XML External Entities Resolution vulnerability in Wonderware Information Server Vulnerable softwareWonderware Information Server Version: 4.0 SP1 Portal, 4.5 Portal, 5.0 Portal, and 5.5 PortalLink: http://www.invensys.com/Severity levelSeverity level: Medium Impact: Network Resources and File System Access, Denial of Service Access Vector: Remote CVSS v2: Base Score: 4.9 Vector: (AV:N/AC:M/Au:S/C:P/I:N/A:P)CVE: CVE-2014-5398Software descriptionWonderware Information Server aggregates and presents plant performance metrics and production data to operations, maintenance and engineering personnel, via an easy to implement web solution. Wonderware Information Server as well as Wonderware Intouch HMI are the part of a unified solution for building ArchestrA System Platform SCADA- and HMI-systems. This solution is used by personnel of nuclear power plants, chemical plants and other critically important objects.Vulnerability descriptionThe specialists of the Positive Research center have detected an XML External Entities Resolution vulnerability in Wonderware Information Server.WIS may allow access to local resources (files and internal resources) via unsafe parsing of XML external entities. By using specially crafted XML files, an attacker can cause these products to send the contents of local remote resources to the attacker’s server or cause a denial of service of the system.Update your sofware up to the latest versionAdvisory status 01.04.2014 - Vendor gets vulnerability details 26.08.2014 - Vendor releases fixed version and details 05.09.2014 - Public disclosureCreditsThe vulnerability was detected by Ilya Karpov, Positive Research Center (Positive Technologies Company)Referenceshttp://en.securitylab.ru/lab/PT-2014-20 https://ics-cert.us-cert.gov/advisories/ICSA-14-238-02 Reports on the vulnerabilities previously discovered by Positive Research:http://www.ptsecurity.com/research/advisory/ http://en.securitylab.ru/lab/
