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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2990 Multiple Phoenix Contact products vulnerable to KRACK Attack 22 November 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Phoenix Contact devices Publisher: Phoenix Contact Operating System: Network Appliance Impact/Access: Access Privileged Data -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-13080 CVE-2017-13078 CVE-2017-13077 Reference: ESB-2017.2905 ESB-2017.2620 ESB-2017.2599 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-325-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-325-01) PHOENIX CONTACT WLAN Capable Devices using the WPA2 Protocol Original release date: November 21, 2017 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/. - ------------------------------------------------------------------------------- CVSS v3 6.8 ATTENTION: Public exploits are available. Vendor: PHOENIX CONTACT Equipment: WLAN capable devices using the WPA2 Protocol Vulnerabilities: Reusing a Nonce AFFECTED PRODUCTS PHOENIX CONTACT reports that these vulnerabilities affect all versions of the following WLAN capable devices using the WPA2 Protocol: * BL2 BPC, * BL2 PPC, * FL COMSERVER WLAN 232/422/485, * FL WLAN 110x, * FL WLAN 210x, * FL WLAN 510x, * FL WLAN 230 AP 802-11, * FL WLAN 24 AP 802-11, * FL WLAN 24 DAP 802-11, * FL WLAN 24 EC 802-11, * FL WLAN EPA, * FL WLAN SPA, * ITC 8113, * RAD-80211-XD, * RAD-WHG/WLAN-XD, * TPC 6013, * VMT 30xx, * VMT 50xx, and * VMT 70xx. 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 PHOENIX CONTACT has reported that users operating embedded devices in AP mode are not affected by these vulnerabilities. PHOENIX CONTACT is actively working on discovering how these vulnerabilities affect its products and plans to release future updates as they become available. For more information, please see the advisory at this location: https://cert.vde.com/de-de/advisories/vde-2017-003 PHOENIX CONTACT recommends that users apply the security update provided by Microsoft at the following location for devices running Microsoft Windows: https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/ CVE-2017-13080 If WPA-TKIP is being used for WLAN configuration, PHOENIX CONTACT recommends the user switch to AES-CCMP immediately. 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. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents. These vulnerabilities are not remotely exploitable. High skill level is needed to exploit. 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 in the four-way handshake, CVE-2017-13078: reinstallation of the group key in the four-way handshake, and CVE-2017-13080: reinstallation of the group key in the group key handshake, A CVSS v3 base score of 6.8 has been assigned; the CVSS vector string is (AV:A/ AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N). RESEARCHER Mathy Vanhoef of imec-DistriNet, KU Leuven discovered these vulnerabilities. PHOENIX CONTACT reported these vulnerabilities to CERT@VDE. CERT@VDE coordinated these vulnerabilities with ICS-CERT. - --------------------------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 iQIVAwUBWhUHF4x+lLeg9Ub1AQg03w/+KpZxMovVzw+UC6V2s+TF7kBZQBe0Crfk IKeAwgVT4UHFqrFD08QlF1Q5BzRhfoO2TBz+RhTW/93sjAIAzrmqEt1nrc8MD1MJ 2UzAE2LYlfwJChO8c8XTKby9oULlj7zY+pU/Nz1PfTD6OYr783aGyTVAJUI5YvoL 1MWlYGHMUQ2eicPttl07sYMP/YQxOk75Qxu9sxpFPzMcVzK8cExA4L81G86NgR8Q 7BVjdwzueT5FGuoFY04lDUe79PSy5xC3owvJTU8iqNF+Tp1Mmi2kVoHKlo4xivIz KN2y1zBFTwuqrA3J6HK6J1S1/2b9JFQPFfChGE1OlpROtCzbxy+YtbJjaIlfrfxs Tr5v5TtcziP7ezWwUbiF+JqCA9Q5Xow+qobqYCkIMLKIIoBgUQFMJePGHmeKa0P8 H13xAAv3RybFos7rRIhNDw6+m6Xtl1Oy6TpI+hrqK4yTleHn7Ga0MslzfkfaYC3W dhLHvHGrtnhv3feXXNCmnJHeMnGH2a/qvUQ+HTu2vFSqiJc+ASLNFF3K5jtkuyzh f2g+B7qqIRgPkUVb4j0FjDqMKRa9QSP10UJXjfXNED5D3gognCLrqNsUxStwJEuB rQGv5IPqx0bsyG/zqeoHCdjrt6B4oBpqgzPn94gjBwejpVTJkPORBibgdBYB/R99 nM3oMHUpP44= =yQnT -----END PGP SIGNATURE-----