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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2548 Linux kernel vulnerabilities 11 October 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-14140 CVE-2017-14106 CVE-2017-12134 Reference: ESB-2017.2544 Original Bulletin: http://www.ubuntu.com/usn/usn-3444-1 http://www.ubuntu.com/usn/usn-3444-2 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3444-1 October 10, 2017 linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux: Linux kernel - - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - - linux-gke: Linux kernel for Google Container Engine (GKE) systems - - linux-kvm: Linux kernel for cloud environments - - linux-raspi2: Linux kernel for Raspberry Pi 2 - - linux-snapdragon: Linux kernel for Snapdragon processors Details: Jan H. Schonherr discovered that the Xen subsystem did not properly handle block IO merges correctly in some situations. An attacker in a guest vm could use this to cause a denial of service (host crash) or possibly gain administrative privileges in the host. (CVE-2017-12134) Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14106) 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 system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.4.0-1008-kvm 4.4.0-1008.13 linux-image-4.4.0-1032-gke 4.4.0-1032.32 linux-image-4.4.0-1038-aws 4.4.0-1038.47 linux-image-4.4.0-1075-raspi2 4.4.0-1075.83 linux-image-4.4.0-1077-snapdragon 4.4.0-1077.82 linux-image-4.4.0-97-generic 4.4.0-97.120 linux-image-4.4.0-97-generic-lpae 4.4.0-97.120 linux-image-4.4.0-97-lowlatency 4.4.0-97.120 linux-image-4.4.0-97-powerpc-e500mc 4.4.0-97.120 linux-image-4.4.0-97-powerpc-smp 4.4.0-97.120 linux-image-4.4.0-97-powerpc64-emb 4.4.0-97.120 linux-image-4.4.0-97-powerpc64-smp 4.4.0-97.120 linux-image-aws 4.4.0.1038.40 linux-image-generic 4.4.0.97.102 linux-image-generic-lpae 4.4.0.97.102 linux-image-gke 4.4.0.1032.33 linux-image-kvm 4.4.0.1008.8 linux-image-lowlatency 4.4.0.97.102 linux-image-powerpc-e500mc 4.4.0.97.102 linux-image-powerpc-smp 4.4.0.97.102 linux-image-powerpc64-emb 4.4.0.97.102 linux-image-powerpc64-smp 4.4.0.97.102 linux-image-raspi2 4.4.0.1075.75 linux-image-snapdragon 4.4.0.1077.69 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-3444-1 CVE-2017-12134, CVE-2017-14106, CVE-2017-14140 Package Information: https://launchpad.net/ubuntu/+source/linux/4.4.0-97.120 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1038.47 https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1032.32 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1008.13 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1075.83 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1077.82 ============================================================== ========================================================================== Ubuntu Security Notice USN-3444-2 October 10, 2017 linux-lts-xenial vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3444-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Jan H. Schonherr discovered that the Xen subsystem did not properly handle block IO merges correctly in some situations. An attacker in a guest vm could use this to cause a denial of service (host crash) or possibly gain administrative privileges in the host. (CVE-2017-12134) Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14106) 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 system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-97-generic 4.4.0-97.120~14.04.1 linux-image-4.4.0-97-generic-lpae 4.4.0-97.120~14.04.1 linux-image-4.4.0-97-lowlatency 4.4.0-97.120~14.04.1 linux-image-4.4.0-97-powerpc-e500mc 4.4.0-97.120~14.04.1 linux-image-4.4.0-97-powerpc-smp 4.4.0-97.120~14.04.1 linux-image-4.4.0-97-powerpc64-emb 4.4.0-97.120~14.04.1 linux-image-4.4.0-97-powerpc64-smp 4.4.0-97.120~14.04.1 linux-image-generic-lpae-lts-xenial 4.4.0.97.81 linux-image-generic-lts-xenial 4.4.0.97.81 linux-image-lowlatency-lts-xenial 4.4.0.97.81 linux-image-powerpc-e500mc-lts-xenial 4.4.0.97.81 linux-image-powerpc-smp-lts-xenial 4.4.0.97.81 linux-image-powerpc64-emb-lts-xenial 4.4.0.97.81 linux-image-powerpc64-smp-lts-xenial 4.4.0.97.81 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-3444-2 https://www.ubuntu.com/usn/usn-3444-1 CVE-2017-12134, CVE-2017-14106, CVE-2017-14140 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-97.120~14.04.1 - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBWd2htIx+lLeg9Ub1AQgD6Q//X2pVE46LfMGPceuyehCTaEf8MO8wC3xg DsUz8r3hvlGZLjymO5C/0gsCDrIsUvlhGFKHvK4wG72LpF4/nYkKiBkBE23uodAN 82lt0v/6ZzY6sVjmggcuJ/HQaVaj4zeF71qOOzRhS3ilGt3VfIb8I6DRp+uTWcYH Nfql9ZNlUMqWEnlS+MwVFZ+mMOqF7HCXP9bnsTFOJBjJ68mCPkNXy/r9USBKcEV0 MYtzaqspZl/lFMn8ISpPVQDXYZmQ8FiTTZmlCAsoxEb4ILjbInR/LnRDhE804jGs TXIeQ/YRPyBASKeuob8IQvPAW8FALN7W18qdvSY33/BO1Mh2bheIBmRMqQ14wHT6 SXkT7IKEDQA7m24G9muw6Drnb3KC4UreFBknUWo0GYq3yfeuYP0R516svxfpQ/fl sdcvljsFJ0xA0Xw4CKkoBaVoh2mQSQRj6egQH+Py6iUKWIc1VqOrdgSyVwB1stKG lwV84hiFWAoQn3kdKJ708h3SQkKoTA2tblPvy8N/wvsIfyVRjsj7FTRlixsict7U 7mXzNyIZjAWk1QrMkXDTgCvRltaBmsps9hZtpd/8+t4OzLy7491v0QMeaxIgaZis 8DSmpUyu/nzY16LewF1UFRipg0wGvzP2xTbh33qwtUCD4N2MvtMAsDc8gLvuHvJx xCx4waoJUoE= =pM5B -----END PGP SIGNATURE-----