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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2584 Advisory (icsa-19-192-04) Siemens SIMATIC RF6XXR 12 July 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens SIMATIC RF6XXR Publisher: ICS-CERT Operating System: Windows Impact/Access: Access Privileged Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-6329 CVE-2013-0169 CVE-2011-3389 Reference: ASB-2016.0098 ASB-2016.0054.2 ESB-2019.2561 ESB-2019.0097 Original Bulletin: https://www.us-cert.gov/ics/advisories/icsa-19-192-04 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-19-192-04) Siemens SIMATIC RF6XXR Original release date: July 11, 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 5.9 o ATTENTION : Exploitable remotely/public exploits are available o Vendor : Siemens o Equipment : SIMATIC RF6XXR o Vulnerabilities : Improper Input Validation, Cryptographic Issues 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow access to sensitive information. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Siemens reports that the vulnerabilities affect all versions prior to 3.2.1 of the following SIMATIC RF6XXR UHF RFID products: o RF615R o RF68XR 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER INPUT VALIDATION CWE-20 The SSL protocol encrypts data by using CBC mode with chained initialization vectors, which may allow a man-in-the-middle attack to obtain plaintext HTTP headers. CVE-2011-3389 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/ C:H/I:N/A:N ). 3.2.2 CRYPTOGRAPIC ISSUES CWE-310 Long-duration TLS sessions used with a 64-bit block cipher may allow remote attackers to obtain cleartext data. CVE-2016-6329 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/ C:H/I:N/A:N ). 3.2.3 CRYPTOGRAPIC ISSUES CWE-310 Outdated versions of TLS and DTLS allow statistical analysis of timing data for crafted packets, which may allow remote attackers to conduct distinguishing and plaintext-recovery attacks. CVE-2013-0169 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/ C:H/I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS : Critical Manufacturing, Food and Agriculture, Transportation Systems o COUNTRIES/AREAS DEPLOYED : Worldwide o COMPANY HEADQUARTERS LOCATION : Germany 3.4 RESEARCHER Wendy Parrington from United Utilities reported these vulnerabilities to Siemens. 4. MITIGATIONS Siemens recommends users upgrade to Version 3.2.1 or newer for both affected products. Siemens also recommends users restrict network access to the device. For more information on these vulnerabilities and associated software updates, please see Siemens' security advisory SSA-556833 at: https://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 webpage on us-cert.gov . 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 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. High skill level is needed to exploit. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXSgafmaOgq3Tt24GAQg7BQ/7B/SUubDTxBa5WVUSsHhECsfsuDK/h2em QadIUu5EEPhnlnkMklI5gZxELlB4dfn3G4BOdF4+aImZf2y4CnK1MHajqNV8bjOf AkEPbM8I2ZCf3Tz1n889Lg34QNACeIeflJ+gYw/xCof/GYNU+0NEQjIUB1RCp3Q5 7cWonGQQjRQ39mA2eb54rJ0Qo1Eg4FWYYOTEITdVIx+4dSLO9f/lHwUL9uvuwaOV Mjy351Yx91NGE4BCWMVMaNh5B8f2yKOnz4XBmb8rbM3WdRDbqhR6gMPhprg6a9WI J61KuVVS1U7B79z/RstjBZi14qp6r0qA2lOOhqr8pT1SoBXUrpDIHQ1r0e0I04Yn WHuyp4uaqE9trLp5k/XAvCE9LD1JhvoyGP1xgkkuvyk+Rf7NqpdLn3+WcqJkFV38 QRi2DORYiLdDpitWeHz9ItIlGY/diWZ1lPd6V6a1ptzRQEsA4umx7aYK+wOWN2zl EvRkrn/zUsdjNunVYVku1qRa3ibS5dkd1HJ/rX11UBXzm/HmTBc+bhrr9VUyUnCV QFEhSJbxI7W8LU2zN4kyBGZbSIGXY0xle2fxl1aZYV46owLLNwI7OYAh+6VVMt8Q kdxCt3qWhBteZ7jOB6bftaCFwJaCFuHMR2Vv9lIp+kc+rSSVIcHrxghnlA2SGTZD jWCKOtfebf8= =IFs8 -----END PGP SIGNATURE-----