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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3247 KRACK attacks patched/mitigated in industrial control tablets 20 December 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Tab-Ex 01 Ex-Handy 09 Ex-Handy 209 Smart-Ex 01 Smart-Ex 201 Pad-Ex 01 i.roc Ci70-Ex CK70A-ATEX CK71A-ATEX CN70A-ATEX CN70E-ATEX Publisher: PEPPERL+FUCHS/ecom instruments Operating System: Android Windows Impact/Access: Access Privileged Data -- Remote/Unauthenticated Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2017-13088 CVE-2017-13087 CVE-2017-13086 CVE-2017-13082 CVE-2017-13081 CVE-2017-13080 CVE-2017-13079 CVE-2017-13078 CVE-2017-13077 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-353-02 - --------------------------BEGIN INCLUDED TEXT-------------------- ATTENTION: Low skill level is needed to exploit. Public exploits are available. Vendor: PEPPERL+FUCHS/ecom instruments Equipment: WLAN capable devices using the WPA2 Protocol Vulnerabilities: Reusing a Nonce AFFECTED PRODUCTS PEPPERL+FUCHS/ecom instruments reports that these vulnerabilities affect all versions of the following WLAN capable devices using the WPA2 Protocol: * Tab-Ex 01, * Ex-Handy 09, * Ex-Handy 209, * Smart-Ex 01, * Smart-Ex 201, * Pad-Ex 01, * i.roc Ci70-Ex, * CK70A-ATEX, * CK71A-ATEX, * CN70A-ATEX, and * CN70E-ATEX. IMPACT Successful exploitation of these vulnerabilities could allow an attacker to operate as a "man-in-the-middle" between the device and the wireless access point. MITIGATION PEPPERL+FUCHS/ecom instruments report the following mitigations: Android * Affected Products: Tab-Ex 01, Ex-Handy 09, Ex-Handy 209, Smart-Ex 01, Smart-Ex 201 * ecom instruments is actively working on these vulnerabilities. This advisory will updated as soon as further significant details are provided by the vendor, with an emphasis on information about available patches. Windows * Affected Products: Pad-Ex 01, i.roc Ci70-Ex, CK70A-ATEX, CK71A-ATEX, CN70A-ATEX, CN70E-ATEX * For ecom instruments devices running Windows, ecom instruments recommends users apply the security update provided by Microsoft. If users are using WPA-TKIP in their WLAN, users should switch to AES-CCMP immediately. For more information CERT@VDE has released a security advisory found at: https://cert.vde.com/de-de/advisories/vde-2017-005 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. VULNERABILITY OVERVIEW REUSING A NONCE, KEY PAIR IN ENCRYPTION CWE-323 Multiple products are affected by key reinstallation attacks known as KRACK. The four-way hand shake traffic in the Wi-Fi Protected Access WPA and WPA2 protocol can be manipulated to allow nonce reuse resulting in key reinstallation. This could allow an attacker to execute a ?man-in-the-middle? attack, enabling the attacker within radio range to replay, decrypt, or spoof frames. The following CVEs have been assigned to this group of vulnerabilities: CVE-2017-13077: Reinstallation of the pairwise key during the four-way handshake. CVE-2017-13078: Reinstallation of the group key during the four-way handshake. CVE-2017-13079: Reinstallation of the Integrity Group Temporal Key (IGTK) during the four-way handshake. CVE-2017-13080: Reinstallation of the group key during the group key handshake. CVE-2017-13081: Reinstallation of the IGTK during the group key handshake. CVE-2017-13082: Reinstallation of the Pairwise Transient Key (PTK) Temporal Key (TK) during the fast BSS transmission (FT) handshake. CVE-2017-13086: Reinstallation of the Tunneled Direct-Link Setup (TDLS) Peer Key (TPK) during the TDLS handshake. CVE-2017-13087: Reinstallation of the Group Temporal Key (GTK) when processing a Wireless Network Management (WNM) Sleep Mode Response frame. CVE-2017-13088: Reinstallation of the IGTK when processing a WNM Sleep Mode Response frame. A CVSS v3 base score of 8.1 has been assigned; the CVSS vector string is (AV:A/ AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N). RESEARCHER Mathy Vanhoef of imec-DistriNet, KU Leuven discovered these vulnerabilities. PEPPERL+FUCHS reported to CERT@VDE that their products are affected. CERT@VDE coordinated these vulnerabilities with ICS-CERT. BACKGROUND Critical Infrastructure Sectors: Communications, Critical Manufacturing, Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Contact Information For any questions related to this report, please contact the NCCIC at: Email: NCCICCUSTOMERSERVICE@hq.dhs.gov Toll Free: 1-888-282-0870 For industrial control systems cybersecurity information: http:// ics-cert.us-cert.gov or incident reporting: https://ics-cert.us-cert.gov/Report-Incident? - --------------------------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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