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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2840 Emerson DeltaV Easy Security Management Application Vulnerability 1 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Emerson DeltaV Publisher: ICS-CERT Operating System: Windows Impact/Access: Increased Privileges -- Existing Account Resolution: Mitigation CVE Names: CVE-2016-9345 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-16-334-02 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-16-334-02) Emerson DeltaV Easy Security Management Application Vulnerability Original release date: November 29, 2016 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 Emerson has released a publication to inform its users of a vulnerability that affects DeltaV Easy Security Management. Emerson is terminating support for the DeltaV Easy Security Management application and highly recommends all users uninstall it from all DeltaV and non-DeltaV workstations. AFFECTED PRODUCTS Emerson reports that the vulnerability affects the DeltaV Easy Security Management application, which is present on the following systems: DeltaV V12.3, DeltaV V12.3.1, and DeltaV V13.3 IMPACT Successful exploitation of this vulnerability could allow a local attacker to elevate privileges within a DeltaV control system. Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation. BACKGROUND Emerson is a US-based company that maintains offices in several countries around the world, including the US, UK, Netherlands, Italy, India, Germany, France, Czech Republic, China, and Australia. The affected product, DeltaV Easy Security Management, is an application included with DeltaV systems v12.3, v12.3.1, and v13.3 that manages the portable media ports and autorun feature for all DeltaV workstations and servers. The DeltaV Easy Security management application allows users to disable portable USB storage devices and autorun on workstations and servers in the DeltaV network. According to Emerson, DeltaV is deployed across several sectors including Chemical and Energy. Emerson estimates that this product is used worldwide. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW IMPROPER PRIVILEGE MANAGEMENT[a] Critical vulnerabilities may allow a local attacker to elevate privileges within the DeltaV control system. CVE-2016-9345[b] has been assigned to this vulnerability. A CVSS v3 base score of 6.8 has been assigned; the CVSS vector string is (AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L).[c] VULNERABILITY DETAILS EXPLOITABILITY This vulnerability is not exploitable remotely and cannot be exploited without user interaction. EXISTENCE OF EXPLOIT No known public exploits specifically target this vulnerability. DIFFICULTY Crafting a working exploit for this vulnerability would be difficult. MITIGATION The DeltaV Easy Security Management server and monitoring agents can be manually uninstalled by users with privileges to install/uninstall Windows applications on each given workstation or server. A more detailed procedure to uninstall the DeltaV Easy Security application is available in the Emersons Knowledge Base Article # NK-1600-0336 through Emersons Guardian Support Knowledge Base. Simplified steps are as follows: 1) Log into each one of the workstations/servers running DeltaV Easy Security and launch Windows Programs and Features. 2) Uninstall the Easy Security Server and Agent application using the uninstall button. A computer reboot is not required to complete these steps. The built-in user account created during the DeltaV Easy Security installation is also removed during the uninstall process. Emerson will provide additional details explaining how to manage USB ports and autorun features using Windows Group Policies in the near future as part of another Knowledge Base Article to be published through Emersons Guardian Support Knowledge Base. ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: 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 reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. ICS-CERT 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 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. 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-269: Improper Privilege Management, https://cwe.mitre.org/data/definitions/269.html, web site last accessed November 29, 2016. b. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9345, 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, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S..., web site last accessed November 29, 2016. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov (link sends e-mail) 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 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWD92xIx+lLeg9Ub1AQiu7g//clJvhRfYBdnkOZpejVqnDQ4dU2l75aWD vI+T04zyX0swEHbzRZ1ytLSII1wKfcjg0FXcmD+JyXs1xnZU+8N6R9w3636UF8FV 9C9K5bm5A2AjhcfZ65NTfrBGq8EUqsppcZnkyz9oRmSm0VFQyOZ3PjsITiJCvX43 M9CYbKjeKc9pazFg1PJut9YPQufYHnePLDw2sbhXvZinu6g2RHpOr1aZrO+Bs/nF CNP9LssqxfWjGUmsaA/sjrMEegtlt+y6yX9zJSCAuiVeqo2vcKzAkmZ+n+Z4KBto znUKaRKsr/lx51l6eKZDF+0clnLXxR4oPhIO9uJZKzkx467vAO7ogjvhaKUJasFC iSH0diO48GHGDof3eTDxaxwFaRK9/qnn+7S6egEoyFh1D+bNCBXpkz58eU5Q8B/q l5t/HxjUh39zxcRJszhHR/B/o6AEYPTq/dPus0vttrNpqkNrLoLojsATe/WKsBT8 YWcOxghPFN+OR7yw29IvyUjNJ2z2X8iAPzKALWIkY5ICM4faRWmMEhegkcvWZoEo 1ntaGaJw3Ev2riCYFJaQZ2g/x950FvTOv4O+raYymnthLCvKwhikMO/V99XRpauY gEZZePgWXH+708POzAcBl9AOmFVgRfVigKrVgU4OPipne8fnKmEO99LIfhVsC4RI xmaTvjQ1ksU= =ZePk -----END PGP SIGNATURE-----