29 January 2018
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.0281 Linux kernel (HWE) vulnerability 29 January 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade Original Bulletin: http://www.ubuntu.com/usn/usn-3548-2 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3548-2 January 26, 2018 linux-hwe, linux-azure, linux-gcp, linux-oem vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 16.04 LTS Summary: The system could be made to crash or run programs as an administrator. Software Description: - - linux-azure: Linux kernel for Microsoft Azure Cloud systems - - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - - linux-hwe: Linux hardware enablement (HWE) kernel - - linux-oem: Linux kernel for OEM processors Details: USN-3548-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS. Jay Vosburgh discovered a logic error in the x86-64 syscall entry implementation in the Linux kernel, introduced as part of the mitigations for the Spectre vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.13.0-1007-azure 4.13.0-1007.9 linux-image-4.13.0-1008-gcp 4.13.0-1008.11 linux-image-4.13.0-1019-oem 4.13.0-1019.20 linux-image-4.13.0-32-generic 4.13.0-32.35~16.04.1 linux-image-4.13.0-32-lowlatency 4.13.0-32.35~16.04.1 linux-image-azure 126.96.36.1997.8 linux-image-gcp 188.8.131.528.10 linux-image-generic-hwe-16.04 184.108.40.206.52 linux-image-gke 220.127.116.118.10 linux-image-lowlatency-hwe-16.04 18.104.22.168.52 linux-image-oem 22.214.171.1249.23 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://www.ubuntu.com/usn/usn-3548-2 https://www.ubuntu.com/usn/usn-3548-1 https://launchpad.net/bugs/1745564 Package Information: https://launchpad.net/ubuntu/+source/linux-azure/4.13.0-1007.9 https://launchpad.net/ubuntu/+source/linux-gcp/4.13.0-1008.11 https://launchpad.net/ubuntu/+source/linux-hwe/4.13.0-32.35~16.04.1 https://launchpad.net/ubuntu/+source/linux-oem/4.13.0-1019.20 - --------------------------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 email@example.com 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: firstname.lastname@example.org 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 iQIVAwUBWm67f4x+lLeg9Ub1AQgBNg//aITaXVYaMZs2tnSqIbRRtiBBgIN2k8qM 1nUCyWODKsi+jpMNc7Ket9LIkY3JF+W94pCWUzkA/zk1h3v34KybNebHXHCjZ+jF Q6hS93kieMbcOUVrzLHN+zZiacBDwQb3wZGuLTeMAYnXgARsnWvC9z5aMvtFGhOj xPy6EoD56QNksH8zNJc1QsUSUw/W6s1t/vn460mJoQMM4moGPJ0c6hyRrBer/I5a hRDD6ZvzhyW8LQjar5jwBiTOAvmJzNZ3WBWddejwpuc3+uDJp97VLwIu59SHCJhf bpfmEkg3UhooYV0qWqeialFPHnsIj9FzERXcGDGHH7A6ehsfFQkC/bm2y/hb6t4z kLOhgIf3VfphBvAyky98NjDMyMacSya9sOgX3cy/OpmgXEH452a0biLIP4HYDHdc YxsezihvnYxhaN13hsRw3S6/WKEj00qD8Wz/27VewmTuCOisOUbFDDtHLaIFtoOG srytkNpV3CFfrFpJKEaYG5JV6ccd0DE7gqUv5C7sR/xL/LUvlIE19t/QLb7xp/Gd ZhV1qQ0bVFm24yjnjBIF48gn405VqlumFdYz7bwuwqHUoVCe3xeLdPedV9LQtTfN olfHsnhBtdWQKLpfrN6K4W30Y+kd9vXrFKdazZPSsE4it7bK6aVO0613q6D/lkmY Z72nu9gf9+8= =nDrz -----END PGP SIGNATURE-----