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Ubuntu 16.04 LTS USN-3328-1 High: Kernel Issues And Threats

ubuntu
Calendar Grey June 20, 2017
Dist Ubuntu Esm H88
Tackling various kernel vulnerabilities in Ubuntu to protect from threats and enhance system security. Immediate update is advised.
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 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)

A reference count bug was discovered in the Linux kernel ipx protocol

stack. A local attacker could exploit this flaw to cause a denial of

service or possibly other unspecified problems. (CVE-2017-7487)

A double free bug was discovered in the IPv4 stack of the Linux kernel. An

attacker could use this to cause...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update kernel issue ubuntu administrative access

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-81-generic    4.4.0-81.104
  linux-image-4.4.0-81-generic-lpae  4.4.0-81.104
  linux-image-4.4.0-81-lowlatency  4.4.0-81.104
  linux-image-4.4.0-81-powerpc-e500mc  4.4.0-81.104
  linux-image-4.4.0-81-powerpc-smp  4.4.0-81.104
  linux-image-4.4.0-81-powerpc64-emb  4.4.0-81.104
  linux-image-4.4.0-81-powerpc64-smp  4.4.0-81.104
  linux-image-generic             4.4.0.81.87
  linux-image-generic-lpae        4.4.0.81.87
  linux-image-generic-lpae-lts-utopic  4.4.0.81.87
  linux-image-generic-lpae-lts-vivid  4.4.0.81.87
  linux-image-generic-lpae-lts-wily  4.4.0.81.87
  linux-image-generic-lpae-lts-xenial  4.4.0.81.87
  linux-image-generic-lts-utopic  4.4.0.81.87
  linux-image-generic-lts-vivid   4.4.0.81.87
  linux-image-generic-lts-wily    4.4.0.81.87
  linux-image-generic-lts-xenial  4.4.0.81.87
  linux-image-lowlatency          4.4.0.81.87
  linux-image-lowlatency-lts-utopic  4.4.0.81.87
  linux-image-lowlatency-lts-vivid  4.4.0.81.87
  linux-image-lowlatency-lts-wily  4.4.0.81.87
  linux-image-lowlatency-lts-xenial  4.4.0.81.87
  linux-image-powerpc-e500mc      4.4.0.81.87
  linux-image-powerpc-e500mc-lts-utopic  4.4.0.81.87
  linux-image-powerpc-e500mc-lts-vivid  4.4.0.81.87
  linux-image-powerpc-e500mc-lts-wily  4.4.0.81.87
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.81.87
  linux-image-powerpc-smp         4.4.0.81.87
  linux-image-powerpc-smp-lts-utopic  4.4.0.81.87
  linux-image-powerpc-smp-lts-vivid  4.4.0.81.87
  linux-image-powerpc-smp-lts-wily  4.4.0.81.87
  linux-image-powerpc-smp-lts-xenial  4.4.0.81.87
  linux-image-powerpc64-emb       4.4.0.81.87
  linux-image-powerpc64-emb-lts-utopic  4.4.0.81.87
  linux-image-powerpc64-emb-lts-vivid  4.4.0.81.87
  linux-image-powerpc64-emb-lts-wily  4.4.0.81.87
  linux-image-powerpc64-emb-lts-xenial  4.4.0.81.87
  linux-image-powerpc64-smp       4.4.0.81.87
  linux-image-powerpc64-smp-lts-utopic  4.4.0.81.87
  linux-image-powerpc64-smp-lts-vivid  4.4.0.81.87
  linux-image-powerpc64-smp-lts-wily  4.4.0.81.87
  linux-image-powerpc64-smp-lts-xenial  4.4.0.81.87
  linux-image-virtual             4.4.0.81.87
  linux-image-virtual-lts-utopic  4.4.0.81.87
  linux-image-virtual-lts-vivid   4.4.0.81.87
  linux-image-virtual-lts-wily    4.4.0.81.87
  linux-image-virtual-lts-xenial  4.4.0.81.87

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

CVE-2017-1000363, CVE-2017-1000364, CVE-2017-7487, CVE-2017-8890,

CVE-2017-9074, CVE-2017-9075, CVE-2017-9076, CVE-2017-9077,

CVE-2017-9242

June 19, 2017

Topics%20covered

Topics Covered

security advisory denial of service system update kernel issue ubuntu administrative access

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-81.104

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