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=========================================================================Ubuntu Security Notice USN-2842-1
December 17, 2015

linux vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Jan Beulich discovered that the KVM svm hypervisor implementation in the
Linux kernel did not properly catch Debug exceptions on AMD processors. An
attacker in a guest virtual machine could use this to cause a denial of
service (system crash) in the host OS. (CVE-2015-8104)

郭永刚 discovered that the ppp implementation in the Linux kernel did
not ensure that certain slot numbers are valid. A local attacker with the
privilege to call ioctl() on /dev/ppp could cause a denial of service
(system crash). (CVE-2015-7799)

It was discovered that the virtual video osd test driver in the Linux
kernel did not properly initialize data structures. A local attacker could
use this to obtain sensitive information from the kernel. (CVE-2015-7884)

It was discovered that the driver for Digi Neo and ClassicBoard devices did
not properly initialize data structures. A local attacker could use this to
obtain sensitive information from the kernel. (CVE-2015-7885)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 15.04:
  linux-image-3.19.0-41-generic   3.19.0-41.46
  linux-image-3.19.0-41-generic-lpae  3.19.0-41.46
  linux-image-3.19.0-41-lowlatency  3.19.0-41.46
  linux-image-3.19.0-41-powerpc-e500mc  3.19.0-41.46
  linux-image-3.19.0-41-powerpc-smp  3.19.0-41.46
  linux-image-3.19.0-41-powerpc64-emb  3.19.0-41.46
  linux-image-3.19.0-41-powerpc64-smp  3.19.0-41.46

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
  https://ubuntu.com/security/notices/USN-2842-1
  CVE-2015-7799, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.19.0-41.46

Ubuntu 2842-1: Linux kernel vulnerabilities

December 17, 2015
Several security issues were fixed in the kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 15.04: linux-image-3.19.0-41-generic 3.19.0-41.46 linux-image-3.19.0-41-generic-lpae 3.19.0-41.46 linux-image-3.19.0-41-lowlatency 3.19.0-41.46 linux-image-3.19.0-41-powerpc-e500mc 3.19.0-41.46 linux-image-3.19.0-41-powerpc-smp 3.19.0-41.46 linux-image-3.19.0-41-powerpc64-emb 3.19.0-41.46 linux-image-3.19.0-41-powerpc64-smp 3.19.0-41.46 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. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References

https://ubuntu.com/security/notices/USN-2842-1

CVE-2015-7799, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104

Severity
December 17, 2015

Package Information

https://launchpad.net/ubuntu/+source/linux/3.19.0-41.46

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