漏洞类别：Ubuntu
漏洞等级： 
漏洞信息
It was discovered a heap-based buffer overflow in the tipc_msg_build() function in the Linux kernel.
It was discovered that a race condition existed in the timerfd subsystem of the Linux kernel when handling might_cancel queuing.
It was discovered that the Flash-Friendly File System (f2fs) implementation in the Linux kernel did not properly validate superblock metadata.
It was discovered that the Xen virtual block driver did not properly initialize some data structures before passing them to user space.
It was discovered that a use-after-free vulnerability existed in the POSIX message queue implementation in the Linux kernel.
It was discovered that the XFS filesystem did not enforce that the realtime inode flag was settable only on filesystems on a realtime device.
漏洞危害
A local attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-8632)
A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-10661)
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)
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)
A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-11176)
A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14340)
解决方案
Refer to Ubuntu advisory USN-3470-1 for affected packages and patching details, or update with your package manager.
Patch:
Following are links for downloading patches to fix the vulnerabilities:
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-powerpc-smp)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-powerpc-e500mc)
USN-3470-1: 14.04 (Kylin) on src (linux-image-lowlatency)
USN-3470-1: 14.04 (Kylin) on src (linux-image-powerpc-e500)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-lowlatency)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-powerpc64-emb)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-generic-lpae)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-generic)
USN-3470-1: 14.04 (Kylin) on src (linux-image-powerpc-smp)
USN-3470-1: 14.04 (Kylin) on src (linux-image-generic)
USN-3470-1: 14.04 (Kylin) on src (linux-image-powerpc64-smp)
USN-3470-1: 14.04 (Kylin) on src (linux-image-powerpc-e500mc)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-powerpc64-smp)
USN-3470-1: 14.04 (Kylin) on src (linux-image-3.13.0-135-powerpc-e500)
USN-3470-1: 14.04 (Kylin) on src (linux-image-generic-lpae)
USN-3470-1: 14.04 (Kylin) on src (linux-image-powerpc64-emb)
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