漏洞类别：Ubuntu
漏洞等级： 
漏洞信息
It was discovered that the generic SCSI (sg) subsystem in the Linux kernel contained a stack-based buffer overflow.
It was discovered that a NULL pointer dereference existed in the Direct Rendering Manager (DRM) driver for VMWare devices in the Linux kernel.
It was discovered that an integer overflow vulnerability existed in the Direct Rendering Manager (DRM) driver for VMWare devices in the Linux kernel.
It was discovered that an information leak existed in the set_mempolicy and mbind compat syscalls in the Linux kernel.
漏洞危害
A local attacker with access to an sg device could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-7187)
A local attacker could use this to cause a denial of service (system crash). (CVE-2017-7261)
A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-7294)
A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-7616)
解决方案
Refer to Ubuntu advisory USN-3291-1 for affected packages and patching details, or update with your package manager.
Patch:
Following are links for downloading patches to fix the vulnerabilities:
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-lowlatency)
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-powerpc64-emb)
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-powerpc-smp)
USN-3291-1: 16.04 (Xenial) on src (linux-image-powerpc-e500mc)
USN-3291-1: 16.04 (Xenial) on src (linux-image-powerpc-smp)
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-powerpc64-smp)
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-generic-lpae)
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-generic)
USN-3291-1: 16.04 (Xenial) on src (linux-image-powerpc64-smp)
USN-3291-1: 16.04 (Xenial) on src (linux-image-generic-lpae)
USN-3291-1: 16.04 (Xenial) on src (linux-image-powerpc64-emb)
USN-3291-1: 16.04 (Xenial) on src (linux-image-generic)
USN-3291-1: 16.04 (Xenial) on src (linux-image-lowlatency)
USN-3291-1: 16.04 (Xenial) on src (linux-image-4.4.0-78-powerpc-e500mc)
0day
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