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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0153 INVENSYS WONDERWARE HMI REPORTS XSS AND WRITE ACCESS VIOLATION VULNERABILITIES 13 February 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Invensys Wonderware HMI Reports Publisher: US-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Cross-site Scripting -- Remote with User Interaction Denial of Service -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2011-4039 CVE-2011-4038 Original Bulletin: http://www.us-cert.gov/control_systems/pdf/ICSA-12-039-01.pdf - --------------------------BEGIN INCLUDED TEXT-------------------- ICS-CERT ADVISORY ICSA-12-039-01 - INVENSYS WONDERWARE HMI REPORTS XSS AND WRITE ACCESS VIOLATION VULNERABILITIES February 08, 2012 OVERVIEW Independent security researchers Billy Rios and Terry McCorkle have identified cross-site scripting XSS) and write access violation vulnerabilities in the Invensys Wonderware HMI reports product. ICS-CERT has coordinated these two vulnerabilities with Invensys, which has produced a new product version that resolves these reported vulnerabilities. The researchers have confirmed that the new version resolves these vulnerabilities. AFFECTED PRODUCTS According to Invensys, the following versions are affected: Wonderware HMI Reports 3.42.835.0304 and prior. IMPACT Successful attacks could result in data leakage, denial of service, 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 these vulnerabilities based on their environment, architecture, and product implementation BACKGROUND Wonderware is a brand offering of the Operations Management Division of Invensys. Invensys Operations Management is a provider of automation and information technologies and systems. According to Invensys, Wonderware HMI Reports is deployed across several industries including manufacturing, building automation, oil and gas, water and wastewater, healthcare, and electric utilities. Invensys states that these products are used worldwide. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW CROSS-SITE SCRIPTING A XSS [a] vulnerability exists in the Invensys Wonderware HMI Reports application because of a lack of server-side validation of query string parameter values. Exploitation of this vulnerability requires that a user visit a specially crafted URL, which injects client-side scripts into the servers HTTP response to the client. CVE-2011-4038 [b] been assigned to this vulnerability, which is identical to ICS-CERT Advisory ICSA-12-024-01 Ocean Data Systems Dream Reports XSS and Write Access Violation Vulnerabilities. Invensys assessment of the vulnerabilities using the CVSS Version 2.0 calculator rates a CVSS Base Score of 6.0. WRITE ACCESS VIOLATION A write access violation [c] vulnerability exists in the Invensys Wonderware HMI Reports application. Exploitation of this vulnerability requires that a user opens a specially crafted file. This may result in arbitrary code execution. CVE-2011-4039 [d] has been assigned to this vulnerability, which is identical to ICS-CERT Advisory ICSA-12-024-01 Ocean Data Systems Dream Reports XSS and Write Access Violation Vulnerabilities. Invensys assessment of the vulnerabilities using the CVSS Version 2.0 calculator rates a CVSS Base Score of 6.0. EXPLOITABILITY The XSS vulnerability is remotely exploitable. The write access violation is not remotely exploitable and cannot be exploited without user interaction. The exploit is only triggered when a local user runs the vulnerable application and loads a malformed file. EXISTENCE OF EXPLOIT No known exploits specifically target these vulnerabilities. DIFFICULTY An attacker with a low skill level can create the XSS exploit. Social engineering is required to convince the user to visit a malicious site. Crafting a working exploit for the access violation vulnerability would be difficult. Social engineering is required to convince the user to accept the malformed file. Additional user interaction is needed to load the malformed file. This decreases the likelihood of a successful exploit. REFERENCES a. http://cwe.mitre.org/data/definitions/80.html b. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-4038 NIST uses this advisory to create the CVE website report. This website will be active sometime after publication of this advisory. c. http://cwe.mitre.org/data/definitions/119.html d. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-4039 NIST uses this advisory to create the CVE website report. This website will be active sometime after publication of this advisory. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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