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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0445.2 Advisory (ICSA-19-043-03) WIBU SYSTEMS AG WibuKey Digital Rights Management (Update B) 14 March 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WibuKey Digital Rights Management (DRM) Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Increased Privileges -- Console/Physical Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Console/Physical Resolution: Patch/Upgrade CVE Names: CVE-2018-3991 CVE-2018-3990 CVE-2018-3989 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-19-043-03 Revision History: March 14 2019: Significant rewrite of advisory from source. February 13 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-19-043-03) WIBU SYSTEMS AG WibuKey Digital Rights Management (Update B) Original release date: March 12, 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 10.0 - --------- Begin Update B Part 1 of 4 --------- o ATTENTION: Exploitable remotely/low skill level to exploit/public exploits available o Vendor: WIBU-SYSTEMS AG o Equipment: WibuKey Digital Rights Management (DRM) - --------- End Update B Part 1 of 4 --------- o Vulnerabilities: Information Exposure, Out-of-bounds Write, Heap-based Buffer Overflow 2. UPDATE INFORMATION This updated advisory is a follow-up to the advisory update titled ICSA-19-043-03 Siemens Licensing Software for SICAM 230 (Update A) that was published February 14, 2019, on the NCCIC/ICS-CERT website. 3. RISK EVALUATION Successful exploitation of these vulnerabilities may allow information disclosure, privilege escalation, or remote code execution. 4. TECHNICAL DETAILS 4.1 AFFECTED PRODUCTS - --------- Begin Update B Part 2 of 4 --------- The following products are affected by vulnerabilities in WibuKey Digital Rights Management (DRM): o Siemens SICAM 230: All Versions 7.20 and prior, o Siemens SIMATIC WinCC OA (3.14/3.15/3.16): All versions, o COPA-DATA zenon products: All Versions 7.20 and prior (7.50 and 7.60 may also be affected if WibuKey was installed manually), o COPA-DATA straton workbench: All Versions 9.2 and prior, o Sprecher Automation SPRECON-V460 products: All Versions 7.20 and prior (7.50 and 7.60 may also be affected if WibuKey was installed manually), o Phoenix Contact MEVIEW3: All versions prior to 3.14.25 and 3.15.18 - --------- End Update B Part 2 of 4 --------- 4.2 VULNERABILITY OVERVIEW 4.2.1 INFORMATION EXPOSURE CWE-200 A specially crafted IRP (I/O request packet) can cause the driver to return uninitialized memory, which may result in kernel memory disclosure. CVE-2018-3989 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:C/ C:L/I:N/A:N ). 4.2.2 OUT-OF-BOUNDS WRITE CWE-787 A specially crafted IRP (I/O request packet) can cause a buffer overflow resulting in kernel memory corruption, which may allow privilege escalation. CVE-2018-3990 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:C/ C:H/I:H/A:H ). 4.2.3 HEAP-BASED BUFFER OVERFLOW CWE-122 A specially crafted TCP packet sent to Port 22347/TCP can cause a heap overflow, which may lead to remote code execution. CVE-2018-3991 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/ C:H/I:H/A:H ). 4.3 BACKGROUND - --------- Begin Update B Part 3 of 4 --------- o CRITICAL INFRASTRUCTURE SECTORS : Commercial Facilities, Communications, Critical Manufacturing, Energy, Financial Services, Healthcare and Public Health, Transportation Systems - --------- End Update B Part 3 of 4 --------- o COUNTRIES/AREAS DEPLOYED : Worldwide o COMPANY HEADQUARTERS LOCATION : Germany 4.4 RESEARCHER Siemens reported these vulnerabilities to NCCIC. 5. MITIGATIONS - --------- Begin Update B Part 4 of 4 --------- Updated Wibu Systems Software can be found at the following link: https://www.wibu.com/support/user/downloads-user-software.html 5.1 SIEMENS Siemens recommends users upgrade to WibuKey DRM Version 6.50 or newer for all affected Siemens products. Siemens also recommends mitigating CVE-2018-3991 by blocking Port 22347/TCP. For detailed information, see Siemens security advisories SSA-760124 and SSA-844562 at the following link: http://www.siemens.com/cert/en/cert-security-advisories.htm 5.2 COPA-DATA COPA-DATA recommends users upgrade WibuKey DRM to Version 6.50a or newer, restrict physical and network access, segment network traffic, ensure systems using WibuKey WkLAN Server are not external facing, and apply application whitelisting. For detailed information, see COPA_DATA's security advisory at the following link: https://www.copadata.com/fileadmin/user_upload/faq/files/CD_SVA_2019_1.pdf 5.3 SPRECHER AUTOMATION Sprecher Automation recommends users upgrade WibuKey DRM to Version 6.50b or newer, restrict physical and network access, segment network traffic, ensure systems using WibuKey WkLAN Server are not external facing, and apply application whitelisting. For detailed information, see Sprecher Automation's security advisory at the following link: https://www.sprecher-automation.com/fileadmin/kundendaten/teaser/News/2018/ SPRECON-V460_Security_Vulnerability_Announcement_2019-01_Issue_1.pdf 5.4 PHOENIX CONTACT Phoenix Contact has calculated different CVSS vectors from those in the Vulnerability Overview section. See the Phoenix Contact or CERT@VDE advisory for details. Phoenix Contact recommends those using dongle-based licensing to update to WibuKey Version 6.50 or newer. MEVIEW3 Versions 3.14.25 and 3.15.18 will include Version 6.50 of WibuKey. For those using hardware code-based licensing, Phoenix Contact recommends removing the WibuKey application. For detailed information, the Phoenix Contact MEVIEW3 security advisory can be found at the following link: https://www.phoenixcontact.com/psirt CERT@VDE has also published an advisory for the Phoenix Contact MEVIEW3 at the following link: https://cert.vde.com/de-de/advisories/vde-2019-003 - --------- End Update B Part 4 of 4 --------- 5.5 NCCIC 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. NCCIC also recommends that users take the following measures to protect themselves from social engineering attacks: o Do not click web links or open unsolicited attachments in email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. - --------------------------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). 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