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Ubuntu 16.10: USN-3326-1 Moderate: Linux Kernel Denial Of Service

ubuntu
Calendar Grey June 20, 2017
Dist Ubuntu Esm H88
A variety of vulnerabilities within the Linux kernel addressed in Ubuntu 16.10. Upgrade promptly to keep your system protected.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that a use-after-free flaw existed in the filesystem

encryption subsystem in the Linux kernel. A local attacker could use this

to cause a denial of service (system crash). (CVE-2017-7374)

It was discovered that the stack guard page for processes in the Linux

kernel was not sufficiently large enough to prevent overlapping with the

heap. An attacker could leverage this with another vulnerability to execute

arbitrary code and gain administrative privileges (CVE-2017-1000364)

Roee Hay discovered that the parallel port printer driver in the Linux

kernel did not properly bounds check passed arguments. A local attacker

with write access to the kernel command line arguments could use this to

execute arbitrary code. (CVE-2017-1000363)

Ingo Molnar discovered that the VideoCore DRM driver in the Linux kernel

did not return an error after d...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attack system crash

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-56-generic    4.8.0-56.61
  linux-image-4.8.0-56-generic-lpae  4.8.0-56.61
  linux-image-4.8.0-56-lowlatency  4.8.0-56.61
  linux-image-4.8.0-56-powerpc-e500mc  4.8.0-56.61
  linux-image-4.8.0-56-powerpc-smp  4.8.0-56.61
  linux-image-4.8.0-56-powerpc64-emb  4.8.0-56.61
  linux-image-generic             4.8.0.56.69
  linux-image-generic-lpae        4.8.0.56.69
  linux-image-lowlatency          4.8.0.56.69
  linux-image-powerpc-e500mc      4.8.0.56.69
  linux-image-powerpc-smp         4.8.0.56.69
  linux-image-powerpc64-emb       4.8.0.56.69
  linux-image-powerpc64-smp       4.8.0.56.69
  linux-image-virtual             4.8.0.56.69

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://ubuntu.com/security/notices/USN-3326-1

CVE-2017-1000363, CVE-2017-1000364, CVE-2017-5577, CVE-2017-7374,

CVE-2017-8890, CVE-2017-9074, CVE-2017-9075, CVE-2017-9076,

CVE-2017-9077, CVE-2017-9242

Severity
important
Lowest
Low
Medium
High
Critical

June 19, 2017

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attack system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/4.8.0-56.61

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