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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2457.2 Siemens Ruggedcom ROS, SCALANCE 11 October 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens Ruggedcom ROS Siemens SCALANCE Publisher: US-CERT Operating System: Network Appliance Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-12736 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-271-01 https://ics-cert.us-cert.gov/advisories/ICSA-17-271-01A Revision History: October 11 2017: Firmware update information September 29 2017: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-271-01) Siemens Ruggedcom ROS, SCALANCE Original release date: September 28, 2017 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/. CVSS v3 8.8 ATTENTION: Remotely exploitable/low skill level to exploit. Vendor: Siemens Equipment: Ruggedcom ROS, SCALANCE Vulnerability: Improper Access Control AFFECTED PRODUCTS Siemens reports that the vulnerability affects the following devices which use the Ruggedcom Discovery Protocol (RCDP): RUGGEDCOM ROS for RSL910 devices: All versions prior to ROS v5.0.1 RUGGEDCOM ROS for all other devices: All versions prior to ROS v4.3.4 SCALANCE XB-200/XC-200/XP-200/XR300-WG: All versions newer than v3.0 SCALANCE XR-500/XM-400: All versions newer than v6.1 IMPACT Successful exploitation of this vulnerability could allow users of networks adjacent to the targeted device to perform unauthorized administrative actions. MITIGATION Siemens provides Ruggedcom ROS firmware Version v4.3.4, v5.0.1 and Ruggedcom Explorer v1.5.2 which fixes the vulnerability and recommends users update to the newest version. The firmware updates for the Ruggedcom ROS-based devices can be obtained for free by contacting the Ruggedcom support team at support@ruggedcom.com (link sends e-mail) Siemens is preparing updates for the remaining affected products and recommends that users manually deactivate RCDP according to the instructions in the user guide. The user guide can be found on the Siemens web site at the following location: https://support.industry.siemens.com/cs/ww/en/view/109748693 (link is external) As a general security measure, Siemens advises configuring the IT environment according to Siemens operational guidelines in order to run the devices in a protected manner. https://www.siemens.com/cert/operational-guidelines-industrial-security (link is external) For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-856721 at the following location: http://www.siemens.com/cert/en/cert-security-advisories.htm (link is external) NCCIC/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. No known public exploits specifically target this vulnerability. VULNERABILITY OVERVIEW IMPROPER ACCESS CONTROL CWE-284 After initial configuration, the RCDP is still able to write to the device under certain conditions, potentially allowing users located in the adjacent network of the targeted device to perform unauthorized administrative actions. CVE-2017-12736 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). RESEARCHER Siemens reported this vulnerability to ICS-CERT. BACKGROUND Critical Infrastructure Sectors: Energy, Healthcare and Public Health, and Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany 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. =================================================================== Advisory (ICSA-17-271-01A) Siemens Ruggedcom ROS, SCALANCE (Update A) Original release date: September 28, 2017 | Last revised: October 10, 2017 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/. CVSS v3 8.8 ATTENTION: Remotely exploitable/low skill level to exploit. Vendor: Siemens Equipment: Ruggedcom ROS, SCALANCE Vulnerability: Improper Access Control UPDATE INFORMATION This updated advisory is a follow-up to the original advisory titled ICSA-17-271-01 Siemens Ruggedcom ROS and SCALANCE that was published September 28, 2017, on the NCCIC/ICS-CERT web site. AFFECTED PRODUCTS Siemens reports that the vulnerability affects the following devices which use the Ruggedcom Discovery Protocol (RCDP): RUGGEDCOM ROS for RSL910 devices: All versions prior to ROS v5.0.1 RUGGEDCOM ROS for all other devices: All versions prior to ROS v4.3.4 SCALANCE XB-200/XC-200/XP-200/XR300-WG: All versions newer than v3.0 SCALANCE XR-500/XM-400: All versions newer than v6.1 IMPACT Successful exploitation of this vulnerability could allow users of networks adjacent to the targeted device to perform unauthorized administrative actions. MITIGATION - --------- Begin Update A Part 1 of 1 -------- Siemens provides Ruggedcom ROS firmware Version v4.3.4, v5.0.1 and Ruggedcom Explorer v1.5.2 which fixes the vulnerability and recommends users update to the newest version. The firmware updates for the Ruggedcom ROS-based devices can be obtained for free by contacting the Ruggedcom support team at: https://support.industry.siemens.com/my/us/en/requests (link is external) - --------- End Update A Part 1 of 1 ---------- Siemens is preparing updates for the remaining affected products and recommends that users manually deactivate RCDP according to the instructions in the user guide. The user guide can be found on the Siemens web site at the following location: https://support.industry.siemens.com/cs/ww/en/view/109748693 (link is external) As a general security measure, Siemens advises configuring the IT environment according to Siemens operational guidelines in order to run the devices in a protected manner. https://www.siemens.com/cert/operational-guidelines-industrial-security (link is external) For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-856721 at the following location: http://www.siemens.com/cert/en/cert-security-advisories.htm (link is external) 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 ICSCERT 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. No known public exploits specifically target this vulnerability. VULNERABILITY OVERVIEW IMPROPER ACCESS CONTROL CWE-284 After initial configuration, the RCDP is still able to write to the device under certain conditions, potentially allowing users located in the adjacent network of the targeted device to perform unauthorized administrative actions. CVE-2017-12736 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). RESEARCHER Siemens reported this vulnerability to ICS-CERT. BACKGROUND Critical Infrastructure Sectors: Energy, Healthcare and Public Health, and Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany 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 iQIVAwUBWd2b7Yx+lLeg9Ub1AQhxfw/+NtqXiXYYWkLU0Q96jlxlGGUWbA7YAQbK P9XJbyTZhV1xK2YmY91Gpn5rqJP+B2CbpZ6MI2VMh5L2AvHrghYzESi9IzCi+CXH m0sES64ZkWoLEBBi7m9MGB0ICb/rOzbLNYGLBf27xZbxTKdF+Tv3xlxX3JasnvOC QN/zIKOkezXUJ6SqUGUHKIFzSwPZWyNrErHNWcnGy27InvJtqmHIziRosyEL1xW6 lv+wFt2TvVxb8iVNyC5MUNsOvW/LITKz9xpKT0jUxACv0Ds/76P3odcbehRL0bGw AXdjMmWe7t4adjbngff3T/RKUacwOLzW5afTFNX/lsGgzgUqDQQkmZrH9xQXe5cM OIbDkDsQRIEr6+YkEf7ZjZdsH1VhQVcO+XNBOsC7dnQ3ru2emDHR7d1TPKUqv5/e LhE9xf+SfoTxKUGwJDYIwJD6o5d5ob2CQddNGPhXMrCmG+KloJkue2p5HWmh6yKW 7lvTQp6VtaG0iDXnIKda7MJ8FG3qmfZ58G8eQsUnKMa3ToRBdN3ftR6U6B1D49d7 JQEQ5CsXOZVN7gxrR2coxTkl08QPvTcY678ynoX/G9mWhN15HvHYIQYJtlR0wtFe mU4oES+5mzdiM7edaQcQCn4zVIY23RYO/jPcyuXIOXRnhGoJZ2XjFxe/2lKv4iW9 LWzeakhJgEo= =TS42 -----END PGP SIGNATURE-----