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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3115 Key Negotiation of Bluetooth Vulnerability 14 August 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco products Publisher: Cisco Systems Operating System: Cisco Impact/Access: Unauthorised Access -- Console/Physical Resolution: Patch/Upgrade CVE Names: CVE-2019-9506 Reference: ASB-2019.0238 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190813-bluetooth - --------------------------BEGIN INCLUDED TEXT-------------------- Key Negotiation of Bluetooth Vulnerability Priority: Medium Advisory ID: cisco-sa-20190813-bluetooth First Published: 2019 August 13 17:00 GMT Version 1.0: Interim Workarounds: No workarounds available CVE-2019-9506 CVSS Score: 9.3 AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:X/RL:X/RC:X Summary o A weakness in the Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) protocol core specification exposes a vulnerability that could allow for an unauthenticated, adjacent attacker to perform a man-in-the-middle attack on an encrypted Bluetooth connection. The attack must be performed during negotiation or renegotiation of a paired device connection; existing sessions cannot be attacked. The issue could allow the attacker to reduce the entropy of the negotiated session key that is used to secure a Bluetooth connection between a paired device and a host device. An attacker who can successfully inject a malicious message into a Bluetooth connection during session negotiation or renegotiation could cause the strength of the session key to be susceptible to brute force attack. This advisory will be updated as additional information becomes available. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190813-bluetooth Affected Products o The Vulnerable Products section includes Cisco bug IDs for each affected product. The bugs are accessible through the Cisco Bug Search Tool and contain additional platform-specific information, including workarounds (if available) and fixed software releases. Vulnerable Products The following table lists Cisco products that are affected by the vulnerability that is described in this advisory: Product Cisco Bug ID Cisco Collaboration Desk Endpoints Cisco Webex DX70 CSCvq80515 Cisco Webex DX80 CSCvq80515 Cisco IP Phones Cisco 8821 Wireless IP Phones CSCvq80441 Cisco 8845 IP Phones CSCvq80432 / CSCvq80432 Cisco 8851 IP Phones CSCvq80439 / CSCvq80431 Cisco 8861 IP Phones CSCvq80439 / CSCvq80431 Cisco 8865 IP Phones CSCvq80432 / CSCvq80432 Cisco SPA525G2 Small Business IP Phones CSCvq80426 Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o For information about fixed software releases, consult the Cisco bug ID(s) that are at the top of this advisory and listed in the Vulnerable Products section of this advisory. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any malicious use of the vulnerability that is described in this advisory. Source o Cisco would like to thank Daniele Antonioli, SUTD, Singapore; Dr. Nils Ole Tippenhauer, CISPA, Germany; and Prof. Kasper Rasmussen, University of Oxford, England, for reporting this issue. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190813-bluetooth Revision History o +---------+--------------------------+---------+---------+----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+---------+----------------+ | 1.0 | Initial public release. | - | Interim | 2019-August-13 | +---------+--------------------------+---------+---------+----------------+ - --------------------------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. 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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 iQIVAwUBXVOMTWaOgq3Tt24GAQizeA/8DM5d5STgEQaOXXuSb7AkQrNK3xKFYkfA sHOmFAnuG8VqeMXbJL91Cmgw8qkSKxOAyIND0dO/wBRMmvNwIB2+WoaQZiNC+ee6 rnjloVHp+3vabPVnwp4iqeEwTXWu09rpFX4qOBPQYL+oMxIHLUW74xIEm+2/u840 ZIkTdqSIn03rie0cmmj65I3HXLvedVOYMWL6Ytx+EROJs6tcwTgkyT+A2+KfUUbf dYPsGMT471Nn3VJH6wI5QRivtnM33K2hc4ljRDVk6NnOdd2csREHEEDOIxxsTr5G wfJbj63eM/ZeRB6SGCQQnfGn36bqFvdsMEzOFRZYlvTgcY0Imlk+z6e713rCuZOn 2oOnpuG5lTkGPqepVQSAxBbo8Qm7ZNHB5tH2cVLEBYp3aa/pYossI08bEMVE7aDU vH4oxB2wBlWnbQ6o/eJeN+mXPzjexHJBgNt9y5ieYc9U4xGXF+SfGScHp0pflBCT HIERG92f4IKPP1sTy+lQG4Y6MYwHnioVuIBrlAeQOR002M/sXqAJdETrVoKIM3M7 4YW/P9UQi7TrEz+oho5+xyBc4Jr48iYx8HR+Pwuh77i0TKAo0ue9l1BIm6v5sLju ghrn3STt/dMyGplgyb1iH0NjF3jQ8N94+pI/FL5Xk68iFcUwvUOdeafED3mfeF5v mfJfKcBPs3Y= =9L8R -----END PGP SIGNATURE-----