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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1206 Siemens SIMOCODE pro V EIP 10 April 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens SIMOCODE pro V EIP Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-12741 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-19-099-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-19-099-01) Siemens SIMOCODE pro V EIP Original release date: April 09, 2019 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 o CVSS v3 7.5 o ATTENTION: Exploitable remotely/low skill level to exploit o Vendor: Siemens o Equipment: SIMOCODE pro V EIP o Vulnerability : Uncontrolled Resource Consumption 2. RISK EVALUATION Successful exploitation of this vulnerability could cause a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of SIMOCODE pro V EIP, a motor management system for low-voltage motors, are affected: o SIMOCODE pro V EIP all versions prior to v1.0.2 3.2 VULNERABILITY OVERVIEW 3.2.1 UNCONTROLLED RESOURCE CONSUMPTION CWE-400 Specially crafted packets sent to Port 161/UDP could cause a denial-of-service condition. The affected devices must be restarted manually. CVE-2017-12741 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:N/I:N/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy, Food and Agriculture, Water and Wastewater Systems o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Siemens ProductCERT reported this vulnerability to NCCIC. 4. MITIGATIONS Siemens recommends users upgrade to Version 1.0.2. Users who cannot upgrade because of hardware restrictions are recommended to apply the manual mitigations. Updates are available for download from the following link: https://support.industry.siemens.com/cs/ww/en/view/109756912 Siemens also recommends users apply the following manual mitigations: o Protect network access to Port 161/UDP of affected devices. o Apply cell protection concept and implement defense-in-depth. o Use VPN for protecting network communication between cells. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for Industrial Security ( Download ) and following the recommendations in the product manuals. Additional information on industrial security for Siemens devices can be found at: https://www.siemens.com/industrialsecurity For more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-141614 at the following location: http://www.siemens.com/cert/advisories NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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 this vulnerability. - --------------------------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. 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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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXK1c2maOgq3Tt24GAQg7ng/7BtFCQQhyxOhRxhqVc/k4iwqQw/Ex+Ya8 q+t9fMZ2V6Lm9kvRErmCFSGkMx0mFG94pEArB2ksmu1Ff1f/DTjshugN/hEpokJc EnmWVWHnDsQVF4PungNH2vWenBDypwALm3kJ7fUAIZwqjA2u0DgTEhpi/uZF0Qrw eSBzGd9Rem9csxUG2j6XaDt7vlJenhX3NCXnTFnZqJj2eTqzjqPixCkQ2rfMKL43 wutetiRxxuhWi2sIQaUMleCS3dd7yqnLHjOdcmIdcWyW0kq7lHjdI+2xlN7yOkn3 da4/Uv8e+bSNRwnP69i3xckTGOwVRazXQE3DYazRAKEJJ7TGOVfal1cuq5pJpaB9 6XDkiuR6YyvLaOPFUOiltIvWJbbEiCDDIdFmdBMHYZ+ZZJYF7B5taxVCaGOrNEIE 8sCph1rrpMGhxnXqN3rL4/ni0SprW4x55uNooaX5u9SuxI/RFrybiXegRgwRYczm g5QvU8VQP/dm5CV2wLb/HL/jBXNqOabKMzPK7xNhx89kh/p35GAF99wPLYUp19B3 jaKwrOTMAvOF+EU+3UVaJDBviPqydg3Hheys25FyWwOt1mdP7yU9tQ583vHuGH86 IQxON1p9xDR+TsYlMPBI13LKlup+R7yuEItJs5/hZn1A//+39B6EJX8wgjc0FxGC jZiSxr23u1A= =2dXd -----END PGP SIGNATURE-----