Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2098 Advisory (ICSA-19-162-04) Siemens SCALANCE X 12 June 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens SCALANCE X Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Access Confidential Data -- Console/Physical Resolution: Mitigation CVE Names: CVE-2019-6567 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-19-162-04 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-19-162-04) Siemens SCALANCE X Original release date: June 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 7.1 o ATTENTION: Low skill level to exploit o Vendor: Siemens o Equipment: SCALANCE X Switches o Vulnerability: Storing Passwords in a Recoverable Format 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to reconstruct passwords for users of the affected devices, if the attacker is able to obtain a backup of the device configuration. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Siemens SCALANCE X products are affected by this vulnerability: o SCALANCE X-200:all versions prior to v5.2.4 o SCALANCE X-200IRT: all versions o SCALANCE X-300: all versions o SCALANCE X-414-3E: all versions 3.2 VULNERABILITY OVERVIEW 3.2.1 STORING PASWORDS IN A RECOVERABLE FORMAT CWE-257 The affected devices store passwords in a recoverable format. An attacker may extract and recover device passwords from the device configuration. Successful exploitation requires access to a device configuration backup and impacts confidentiality of the stored passwords. CVE-2019-6567 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:C/C:H/ I:N/A:N ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy, Food and Agriculture, and Water and Wastewater Systems o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Siemens thanks Christopher Wade from Pen Test Partners for coordinated disclosure. Siemens reported this vulnerability to NCCIC. 4. MITIGATIONS Siemens has identified the following specific workarounds/mitigations to reduce the risk from this vulnerability: o SCALANCE X-200: Update to v5.2.4 at: https://support.industry.siemens.com/ cs/ww/en/view/109767965 o SCALANCE X-200IRT: See recommendations following o SCALANCE X-300: See recommendations following o SCALANCE X-414-3E: Migrate to the SCALANCE XM400 product line Until additional updates are available, Siemens recommends users apply the following workarounds/mitigations to reduce the risk from this vulnerability: o Restrict access to configuration backups or archived device configuration data; o Restrict or disable network access to mechanisms that allow retrieval of device configuration, if enabled. o Restrict access to device configuration module C-PLUG, if in use. As a general security measure, Siemens strongly recommends that users protect 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 S iemens' operational guidelines for Industrial Security , and to follow the recommendations in the product manuals. For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert /advisories 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. This vulnerability is not exploitable remotely. - --------------------------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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXQCTo2aOgq3Tt24GAQj09w//Qq8txhCscQxkzHD1tlP42MbWyhueDZxe 7x7wVVQMGTtxUazOHtE9hAQIrwmbHAWMGG8xlXSOpS6eGHXEpxO7plPSJPsRuEO7 H66bb90G37DXV+mQuVwMKFni/v/lkhOG/8qoN8Eqg2ojLt3kAxY+2+byi64FX90e 83Uj3aY35dfparh0j5Qd3ERR9SWlhVKtrVWWO1608vXx/t4jn6kI56KgR9gSCJ9l S/kI0IcHmksFENpDtlPi7e2ksP0QBkDXEUj3lu2J5HU22LMxAI5tbTLyOaZjN3CR bGWkUoJ8NbwBdyh/PmeTVhBj97SQQejrMJSjZ8rP1N6LkixDKjw9h6MM2jt+5QPL tvOTCBbYBsyB6zVUOwxzP2iu8Y+/r1rglPhQKaOLeM6DsNVegyy2ATSpivNKMfUT Je/eGf5rWYxWkE/TVSvkCIZnGozlW+w4N7Iszj8y0S9lataYrcMmkYMnDhY03lSt IJwZNc0iqDMRpwpnYMSRx0LLwZVFpSQ+pvyfaVD/ZZuxzT/JttG1cCLQE1gVbN22 y16bJSlf+K51pOm87xoH8Og5fTHXQJm5jchISv/Kbrk8uuH3nBg9udfF0OxI5eyE CeIjAv/COq6O52khmne/pwuxatuqOUHC3JoKeHaDtzYhzCttp9CVgwiRTAot4Wha IQNt2TatRE0= =p6ho -----END PGP SIGNATURE-----