Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.3056 Linux kernel (Xenial HWE) vulnerabilities 22 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Console/Physical Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-9555 CVE-2016-8645 CVE-2016-8633 CVE-2016-8630 CVE-2016-6213 CVE-2016-4568 CVE-2015-8964 Reference: ASB-2016.0103 ESB-2016.3019 ESB-2016.3005 ESB-2016.2941 Original Bulletin: http://www.ubuntu.com/usn/usn-3161-2 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3161-2 December 20, 2016 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 kernel. Software Description: - - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3161-1 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. Tilman Schmidt and Sasha Levin discovered a use-after-free condition in the TTY implementation in the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2015-8964) It was discovered that the Video For Linux Two (v4l2) implementation in the Linux kernel did not properly handle multiple planes when processing a VIDIOC_DQBUF ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-4568) CAI Qian discovered that shared bind mounts in a mount namespace exponentially added entries without restriction to the Linux kernel's mount table. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-6213) It was discovered that the KVM implementation for x86/x86_64 in the Linux kernel could dereference a null pointer. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the KVM host. (CVE-2016-8630) Eyal Itkin discovered that the IP over IEEE 1394 (FireWire) implementation in the Linux kernel contained a buffer overflow when handling fragmented packets. A remote attacker could use this to possibly execute arbitrary code with administrative privileges. (CVE-2016-8633) Marco Grassi discovered that the TCP implementation in the Linux kernel mishandles socket buffer (skb) truncation. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-8645) Andrey Konovalov discovered that the SCTP implementation in the Linux kernel improperly handled validation of incoming data. A remote attacker could use this to cause a denial of service (system crash). (CVE-2016-9555) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-57-generic 4.4.0-57.78~14.04.1 linux-image-4.4.0-57-generic-lpae 4.4.0-57.78~14.04.1 linux-image-4.4.0-57-lowlatency 4.4.0-57.78~14.04.1 linux-image-4.4.0-57-powerpc-e500mc 4.4.0-57.78~14.04.1 linux-image-4.4.0-57-powerpc-smp 4.4.0-57.78~14.04.1 linux-image-4.4.0-57-powerpc64-emb 4.4.0-57.78~14.04.1 linux-image-4.4.0-57-powerpc64-smp 4.4.0-57.78~14.04.1 linux-image-generic-lpae-lts-xenial 4.4.0.57.44 linux-image-generic-lts-xenial 4.4.0.57.44 linux-image-lowlatency-lts-xenial 4.4.0.57.44 linux-image-powerpc-e500mc-lts-xenial 4.4.0.57.44 linux-image-powerpc-smp-lts-xenial 4.4.0.57.44 linux-image-powerpc64-emb-lts-xenial 4.4.0.57.44 linux-image-powerpc64-smp-lts-xenial 4.4.0.57.44 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: http://www.ubuntu.com/usn/usn-3161-2 http://www.ubuntu.com/usn/usn-3161-1 CVE-2015-8964, CVE-2016-4568, CVE-2016-6213, CVE-2016-8630, CVE-2016-8633, CVE-2016-8645, CVE-2016-9555 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-57.78~14.04.1 - --------------------------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 iQIVAwUBWFsQSIx+lLeg9Ub1AQipuw/7BGt0IYZ4RGoYBhJ3D5mu+pQZfL2+hvt8 B6fanJywUwgTpQOUGn/EdE0m9dAADQhPtJxBvqsKBaS6gExqqjlVT7vcupddH/aa yvqt1qX7RbIem9fnj1DaG8tTJ8dhY9N7ROY40Tj22g/aCokRWyjIWBD7c+OjU30e ++erHJ0KQ6xCApGeFe6hWja/60M3+Ma2blO/kCJ5SPH2d6fqy1bs6XaKQpn+Uoc5 nKh/3YgHhUIeUUdGPEM2IDSBxA60C/3+lXnxti4ycmQ50kMJ1EtO56MSaMSOhXbK y5NOgBSuLmAMHg2lRphTF5tgEmKNIrJM+NWwTf+gY20PO4R+nLd4psOJ3C6KzJ/G /WIPscEQ+AFLtGtE2wa+OEumxQAN/O/n5NATy3AU5+2GamFX3GgGSsw310mrHuIR NHFdLroKLwtO/MWkcN+roEf65dSttArc9wsX6SavNZEeVy0hlHxv2U9Sy1iKcKAD TfOvZA/fuo+j2sMgxomtDi64Tt960Irr0yTVnZbn8sEUX+g7yr7PjAu/PS2eJ+AB DyKfnaWdq71bz4e3Vj+HprKm4diG9DHAM3fsojt9mz0qDhtPZVg96nJJIM91IFcR URapuuigtaUupfQXtKLotxaz/NlV3IlzyzDBlK6SnRWekYhYqnpcxfcSlbQsRFwX Q8jgJaZ/jdY= =LvCI -----END PGP SIGNATURE-----