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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1640 Advisory (ICSA-18-151-02) GE MDS PulseNET and MDS PulseNET Enterprise 1 June 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: GE MDS PulseNET GE MDS PulseNET Enterprise Publisher: ICS-CERT Operating System: Windows Linux variants Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Delete Arbitrary Files -- Existing Account Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-10615 CVE-2018-10613 CVE-2018-10611 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-18-151-02 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-18-151-02) GE MDS PulseNET and MDS PulseNET Enterprise Original release date: May 31, 2018 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/. 1. EXECUTIVE SUMMARY CVSS v3 7.3 ATTENTION: Exploitable remotely/low skill level to exploit Vendor: GE Equipment: MDS PulseNET and MDS PulseNET Enterprise Vulnerabilities: Improper Authentication, Improper Restriction of XML External Entity Reference, Relative Path Traversal 2. RISK EVALUATION Exploitation of these vulnerabilities may allow elevation of privilege and exfiltration of information on the host platform. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS GE reports that the vulnerabilities affect the following MDS PulseNET products: PulseNET Version 3.2.1 and prior and, PulseNET Enterprise Version 3.2.1 and prior. 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER AUTHENTICATION CWE-287 Java Remote Method Invocation (RMI) input port may be exploited to allow unauthenticated users to launch applications and support remote code execution through Web Services. CVE-2018-10611 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). 3.2.2 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE ('XXE') CWE-611 Multiple variants of XML External Entity (XXE) attacks may be used to exfiltrate data from the host Windows platform. CVE-2018-10613 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). 3.2.3 RELATIVE PATH TRAVERSAL CWE-23 Directory traversal may lead to files being exfiltrated or deleted on the host platform. CVE-2018-10615 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). 3.3 BACKGROUND o Critical Infrastructure Sectors: Energy, Water and Wastewater Systems, and others o Countries/Areas Deployed: Worldwide o Company Headquarters Location: United States 3.4 RESEARCHER rgod reported the vulnerabilities to Zero Day Initiative (ZDI). 4. MITIGATIONS GE has modified the product architecture and software of PulseNET. The latest version mitigates these specific vulnerabilities. GE encourages users to update PulseNET to Version 4.1 or newer to eliminate these vulnerabilities. Updates for PulseNET are available at: http://www.gegridsolutions.com/Communications/MDS/PulseNET_Download.aspx Updates to PulsetNET Enterprise are available at: http://www.gegridsolutions.com/Communications/MDS/PulseNETEnt_Download.aspx In addition, GE recommends securing the PulseNET server using a defense in depth approach. Some key security considerations when deploying the PulseNET application include ensuring: o Electronic and physical access to the PulseNET server is limited to only authorized individuals and clients o The host server is dedicated to the PulseNET application only o The PulseNET server is not accessible from the Internet o The principle of least privilege is applied to the host operating system o The PulseNET server is appropriately hardened and maintained to the current patch level as prescribed by the OEM o The PulseNET server is restricted to communicating with MDS hosts only. GE has published a product bulletin with mitigation for these vulnerabilities on their webpage at the following location: http://www.gegridsolutions.com/app/DownloadFile.aspx?prod=pulsenet&type=9&file=1 (login required). NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o 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. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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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