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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3031 Kernel Live Patch Security Notice LSN-0032-2 30 November 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-14140 CVE-2017-12154 CVE-2017-12153 CVE-2017-10911 Reference: ESB-2017.2807 ESB-2017.2751 ESB-2017.2552 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Kernel Live Patch Security Notice LSN-0032-2 November 23, 2017 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu: | Series | Base kernel | Arch | flavors | |------------------+--------------+----------+------------------| | Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency | Summary: Several security issues were fixed in the kernel. Software Description: - - linux: Linux kernel Details: Anthony Perard discovered that the Xen virtual block driver did not properly initialize some data structures before passing them to user space. A local attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. (CVE-2017-10911) Bo Zhang discovered that the netlink wireless configuration interface in the Linux kernel did not properly validate attributes when handling certain requests. A local attacker with the CAP_NET_ADMIN could use this to cause a denial of service (system crash). (CVE-2017-12153) It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service (system crash). (CVE-2017-12154) Otto Ebeling discovered that the memory manager in the Linux kernel did not properly check the effective UID in some situations. A local attacker could use this to expose sensitive information. (CVE-2017-14140) Update instructions: The problem can be corrected by updating your livepatches to the following versions: | Kernel | Version | flavors | |-------------------------------------+----------+--------------------------| | 4.4.0-97.120 | 32.2 | generic, lowlatency | | lts-4.4.0-67.88_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-83.106_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-93.116_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | | lts-4.4.0-97.120_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency | Additionally, you should install an updated kernel with these fixes and reboot at your convienience. References: CVE-2017-10911, CVE-2017-12153, CVE-2017-12154, CVE-2017-14140 - -- - --------------------------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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWh9KS4x+lLeg9Ub1AQi4XBAAnCeU2kWs1LXU3xfEuDQZwkMKblxxKoSz ijk1QZ5Bhl9+0bSWEWTxbfBo2nT6HNBT4UAWoV6VVaReSkgpmHVeYH75OmcyZ7/X alPoMTej9mko84djSSR7a4+mTApAT+LgR+r8PV1ZE+Yi1mXSiPHff86k4zakWGez V3LWNU2Tzo91QdNKgaHE+mPqnyYNZQynx5447ZDOxPz4RbUMSgddWNaX23+0rkXR jVqcjvYprJUqjY9PJ+BDgTMcezNJb9cIsA27B4CTaEhXeU/ecmsU7j91QWBUXGNM l0EcIhr8Qnedc6uyKT1noczR102ZzQbl7OwG+k/tOjSof2CnLKxcDoUzOMji+Ly6 A1rW6el8jVnZqQmzmbl7y28Kq+wgAO7MLxZShFVDcxBjqB7JeDC+ihaS3FwqXMdo SdKTuJGCtCK039Qvy6U69NFzlxH4T5XrPgOaKn7IZYGI2MvIWj/dL1dj6dTfPIVI sVBPjTQelGTqvbK4iW/UtsjpvKPeteDXQ9RtdU5PYoGSWG+lvkmn+qdHNDHqpZqX F2ItgVUKTx0hM+KJBfn0W6QcyuRg08KQcz6UFPpn7nWBWoyXJi3+ROYJhK2gP1S4 l31iFFJfly12hQJ/cWRHnj/6mkd1YTQMbZ9W6/oMMkuW6gbIGRsMzklQzTTNnnPZ 2Dfy6I3YBLI= =qBoi -----END PGP SIGNATURE-----