Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3989 USN-5155-1: BlueZ vulnerabilities 24 November 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BlueZ Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Remote/Unauthenticated Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-43400 CVE-2021-41229 CVE-2021-3658 Original Bulletin: https://ubuntu.com/security/notices/USN-5155-1 Comment: This advisory references vulnerabilities in products which run on platforms other than Ubuntu. It is recommended that administrators running BlueZ check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5155-1: BlueZ vulnerabilities 23 November 2021 Several security issues were fixed in BlueZ. Releases o Ubuntu 21.10 o Ubuntu 21.04 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o bluez - Bluetooth tools and daemons Details It was discovered that BlueZ incorrectly handled the Discoverable status when a device is powered down. This could result in devices being powered up discoverable, contrary to expectations. This issue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10. ( CVE-2021-3658 ) It was discovered that BlueZ incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause BlueZ to consume resources, leading to a denial of service. ( CVE-2021-41229 ) It was discovered that the BlueZ gatt server incorrectly handled disconnects. A remote attacker could possibly use this issue to cause BlueZ to crash, leading to a denial of service. ( CVE-2021-43400 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10 o libbluetooth3 - 5.60-0ubuntu2.1 o bluez - 5.60-0ubuntu2.1 Ubuntu 21.04 o libbluetooth3 - 5.56-0ubuntu4.3 o bluez - 5.56-0ubuntu4.3 Ubuntu 20.04 o libbluetooth3 - 5.53-0ubuntu3.4 o bluez - 5.53-0ubuntu3.4 Ubuntu 18.04 o libbluetooth3 - 5.48-0ubuntu3.6 o bluez - 5.48-0ubuntu3.6 In general, a standard system update will make all the necessary changes. References o CVE-2021-3658 o CVE-2021-41229 o CVE-2021-43400 - --------------------------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 iQIVAwUBYZ24DuNLKJtyKPYoAQgffg//brcHOZLJ1RZFeoEq+dwrI7mtmBr0TYgO 6GxhnVT9rn4/aIfetlZ4RToFi26eGVph6nnKLu1kWEvULnwjtSVJd2xNgFAPdS3w r2i/SCnEJP1hCveLx55fqMuk5ACQOPFSl4ME3qgP05yI4uX4K5mn3OpX9DPNAex1 UXRgOl3xuxr7uyMCgDPu26iu++7qFRPZgNUejBAtc1Vk/Uiu2e9OnXvTAOBc0rgh 9l4gNbsU7o+CfE+vrhlO0MBwH4L305fVPS2xHfwhoX/zgfvkOEfbyR6FTKdfZHjS Rf4NhS54v2pLJYv8JPqolopwbPta/Ojt5xUPfhocmazhWKbO1YGHMVZTa20OzL0V L/9A6iGr1SVbWxOw3VFmxfKhfVVy/oHUnZlnwcdKo8kDksmPx1T+k04rGJIObJak bNUL0SdGCm3Q2OjKtbK4bT4B7mFAJSd662uVMtkFI11OS9K9OSmbYsbc3nXftvvb Tmf6xGqhTVyKgsgAwRz/1WayOHRxFq0C5BTjVMiA6w4erREiHJmoDOR3stv7iCqE 9ThW1orD33JNORAuUUWrllzLoqpjE/vJD6vfzMbMAnhIQtzT8q/oswuhwyDk2vpo JE/iO04ECAA35AX0lJsF4S1jHSmteX2nV1DDEC9pp6QuCUcfB12k8HuM8aTPX71s VGeqxlAjRQw= =EtWc -----END PGP SIGNATURE-----