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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2763 Linux kernel vulnerabilities 1 November 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-2017-14340 CVE-2017-11176 CVE-2017-10911 CVE-2017-10663 CVE-2017-10662 CVE-2017-10661 CVE-2016-8632 Reference: ESB-2017.1039 ESB-2017.0468 ESB-2017.0397 ESB-2017.0356 ESB-2017.0341 ESB-2017.0273 ESB-2017.0226 Original Bulletin: http://www.ubuntu.com/usn/usn-3470-1 http://www.ubuntu.com/usn/usn-3470-2 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3470-1 October 31, 2017 linux 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: Linux kernel Details: Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build() function in the Linux kernel. A local attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-8632) Dmitry Vyukov discovered that a race condition existed in the timerfd subsystem of the Linux kernel when handling might_cancel queuing. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-10661) It was discovered that the Flash-Friendly File System (f2fs) implementation in the Linux kernel did not properly validate superblock metadata. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-10662, CVE-2017-10663) 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) It was discovered that a use-after-free vulnerability existed in the POSIX message queue implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-11176) Dave Chinner discovered that the XFS filesystem did not enforce that the realtime inode flag was settable only on filesystems on a realtime device. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14340) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-3.13.0-135-generic 3.13.0-135.184 linux-image-3.13.0-135-generic-lpae 3.13.0-135.184 linux-image-3.13.0-135-lowlatency 3.13.0-135.184 linux-image-3.13.0-135-powerpc-e500 3.13.0-135.184 linux-image-3.13.0-135-powerpc-e500mc 3.13.0-135.184 linux-image-3.13.0-135-powerpc-smp 3.13.0-135.184 linux-image-3.13.0-135-powerpc64-emb 3.13.0-135.184 linux-image-3.13.0-135-powerpc64-smp 3.13.0-135.184 linux-image-generic 3.13.0.135.144 linux-image-generic-lpae 3.13.0.135.144 linux-image-lowlatency 3.13.0.135.144 linux-image-powerpc-e500 3.13.0.135.144 linux-image-powerpc-e500mc 3.13.0.135.144 linux-image-powerpc-smp 3.13.0.135.144 linux-image-powerpc64-emb 3.13.0.135.144 linux-image-powerpc64-smp 3.13.0.135.144 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-3470-1 CVE-2016-8632, CVE-2017-10661, CVE-2017-10662, CVE-2017-10663, CVE-2017-10911, CVE-2017-11176, CVE-2017-14340 Package Information: https://launchpad.net/ubuntu/+source/linux/3.13.0-135.184 ========================================================================== Ubuntu Security Notice USN-3470-2 October 31, 2017 linux-lts-trusty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 ESM Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM Details: USN-3470-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build() function in the Linux kernel. A local attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-8632) Dmitry Vyukov discovered that a race condition existed in the timerfd subsystem of the Linux kernel when handling might_cancel queuing. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-10661) It was discovered that the Flash-Friendly File System (f2fs) implementation in the Linux kernel did not properly validate superblock metadata. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-10662, CVE-2017-10663) 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) It was discovered that a use-after-free vulnerability existed in the POSIX message queue implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-11176) Dave Chinner discovered that the XFS filesystem did not enforce that the realtime inode flag was settable only on filesystems on a realtime device. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14340) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-135-generic 3.13.0-135.184~precise1 linux-image-3.13.0-135-generic-lpae 3.13.0-135.184~precise1 linux-image-generic-lpae-lts-trusty 3.13.0.135.125 linux-image-generic-lts-trusty 3.13.0.135.125 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-3470-2 https://www.ubuntu.com/usn/usn-3470-1 CVE-2016-8632, CVE-2017-10661, CVE-2017-10662, CVE-2017-10663, CVE-2017-10911, CVE-2017-11176, CVE-2017-14340 - --------------------------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. 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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 iQIVAwUBWfks3Ix+lLeg9Ub1AQiu5hAAl8B43dDvvR/m+1Kerq2lyrjMvVZ9LzEY 1wSc5GoLmVAxsmreIuJWa8lbFx5wJ4iYOlro4yzlntxUIvwexZK5rM4W+ROgsZyg rtfAdTbuNAPX1jw776gdqMMoDMXOrEmEIP64QIk/S47Pr1i1xJWxR4IH63qAnNh1 m+oJJz8ELJhAryb0AqJ93rljKDGlpggcFBa4+QV3/XMT0ru6wOU7QKFBjt4+QmHK VQ3+pOCq3Lb4ysT4TZe6+gLChcm7auLPSypQsFsZlHFeNbtHRnv/CLpjBR5Vl04Q P4aIA0v7oUY19ypaKsiwcz1cMjuwG9L1u3vvtl3KtgSSljZvA+eVU+yh5VULW/Jk Vh/SEjcniZFzHHMEyVhyKGVzBj0Ovm6hnChXYLRx3dm4OfUrXHqLxV2yLzwfTYbM c+ud702xhwhjMkYgtZBTMNB7W7xOWHZSNrEs2YRFGC4OO+4ODwWfCgQ96FFqJaoc WKgWuGuybSw93NoEXPoSzNFFRSgl0dbXn2jkYW/21GSXZ7Se+YzH+yg948PeFiYc J8oF9+HeTTeqJARapGcGHQ1j7KOAGV+R2TvFzFQ5BzqgL89eX4Y/k0+u6r9oZdta kfUpcj97U2gzBpHhXExONysAK1fKVu365YcZgDodpFQ97ybMQEvmioZ+4i7HjwuM k7fu/Wftq5M= =t3es -----END PGP SIGNATURE-----