01 April 2015
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.0824 Ecava IntegraXor DLL Vulnerabilities 1 April 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Ecava IntegraXor Publisher: US-CERT Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2015-0990 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-15-090-02 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-15-090-02) Ecava IntegraXor DLL Vulnerabilities Original release date: March 31, 2015 Legal Notice All information products included in http://ics-cert.us-cert.gov are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see http://www.us-cert.gov/tlp/. OVERVIEW Security researcher Praveen Darshanam has identified two DLL loading vulnerabilities in Ecavas IntegraXor SCADA Server. Ecava has produced a patch that mitigates these vulnerabilities. Praveen Darshanam has tested the patch to validate that it resolves the vulnerabilities. AFFECTED PRODUCTS The following SCADA Servers are affected: IntegraXor SCADA Server prior to Version 4.2.4488 IMPACT Loading and executing an insecure DLL is equivalent to running malicious code at the privilege level of the application that uses the DLL. Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation. BACKGROUND Ecava Sdn Bhd (Ecava) is a Malaysia-based software development company that provides the IntegraXor SCADA product. Ecava specializes in factory and process automation solutions. The affected product, IntegraXor, is a suite of tools used to create and run a web-based human-machine interface for a SCADA system. According to Ecava, IntegraXor is deployed across several sectors including Critical Manufacturing, Energy, Water and Wastewater Systems, and others. Ecava estimates that this product is used in 38 countries, with the largest installations based in the United Kingdom, the United States, Australia, Poland, Canada, and Estonia. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW UNCONTROLLED SEARCH PATH ELEMENT[a] An attacker could rename a malicious DLL to meet the criteria of the applications, and the applications would not verify the DLL is correct. The attacker needs to have administrative access to the default install location in order to plant the insecure DLL. Once loaded by either application, the DLL could run malicious code at the privilege level of the application. CVE-2015-0990[b] has been assigned to these vulnerabilities. A CVSS v2 base score of 6.8 has been assigned; the CVSS vector string is (AV:L/AC:L/Au:S/C:C/I:C/A:C).[c] VULNERABILITY DETAILS EXPLOITABILITY These vulnerabilities are not exploitable remotely without user interaction. These exploits are only triggered when a local user runs the vulnerable application after loading the malicious DLL file. EXISTENCE OF EXPLOIT No known public exploits specifically target these vulnerabilities. DIFFICULTY Crafting a working exploit for these vulnerabilities would be difficult. Social engineering is required to convince the user to load the malicious DLL file. Additional user interaction is needed to load the malformed file. This decreases the likelihood of a successful exploit. MITIGATION Ecava recommends users download and install the patch at the following location: http://www.integraxor.com/download/rc.msi?4.2.4488 ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks: Do not click web links or open unsolicited attachments in email messages. Refer to Recognizing and Avoiding Email Scams[d] for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks[e] for more information on social engineering attacks In addition, 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 and/or systems, and ensure that they are not accessible from 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 VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices. 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. ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. 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. a. CWE-427: Uncontrolled Search Path Element, http://cwe.mitre.org/data/definitions/427.html, web site last accessed March 31, 2015. b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0990, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. c. CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:L/AC:L/Au:S/C:C/I:C/A:C, web site last accessed March 31, 2015. d. Recognizing and Avoiding Email Scams, http://www.us-cert.gov/reading_room/emailscams_0905.pdf, web site last accessed March 31, 2015. e. National Cyber Alert System Cyber Security Tip ST04-014, http://www.us-cert.gov/cas/tips/ST04-014.html, web site last accessed March 31, 2015. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: firstname.lastname@example.org Toll Free: 1-877-776-7585 International Callers: (208) 526-0900 For industrial control systems security information and incident reporting: http://ics-cert.us-cert.gov ICS-CERT continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------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 email@example.com 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: firstname.lastname@example.org 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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