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Ubuntu 16.04 LTS USN-3361-1 Critical: Linux Kernel Denial Of Service

ubuntu
Calendar Grey July 21, 2017
Dist Ubuntu Esm H88
Upgrade to Ubuntu 16.04 LTS to mitigate security concerns related to the linux-hwe kernel, resolving various vulnerabilities.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-hwe: Linux hardware enablement (HWE) kernel

- linux-meta-hwe:

Details:

USN-3358-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.

This update provides the corresponding updates for the Linux Hardware

Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. Please

note that this update changes the Linux HWE kernel to the 4.10 based

kernel from Ubuntu 17.04, superseding the 4.8 based HWE kernel from

Ubuntu 16.10.

Ben Harris discovered that the Linux kernel would strip extended privilege

attributes of files when performing a failed unprivileged system call. A

local attacker could use this to cause a denial of service. (CVE-2015-1350)

Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel

did not properly validate meta block groups. An attacker with physical

access could use this to specially craft an ext4 image that causes a denial

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update Ubuntu linux-hwe

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-27-generic   4.10.0-27.30~16.04.2
  linux-image-4.10.0-27-generic-lpae  4.10.0-27.30~16.04.2
  linux-image-4.10.0-27-lowlatency  4.10.0-27.30~16.04.2
  linux-image-generic-hwe-16.04   4.10.0.27.30
  linux-image-generic-lpae-hwe-16.04  4.10.0.27.30
  linux-image-lowlatency-hwe-16.04  4.10.0.27.30

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-3361-1

CVE-2015-1350, CVE-2016-10208, CVE-2016-8405, CVE-2016-8636,

CVE-2016-9083, CVE-2016-9084, CVE-2016-9191, CVE-2016-9604,

CVE-2016-9755, CVE-2017-2583, CVE-2017-2584, CVE-2017-2596,

CVE-2017-2618, CVE-2017-2671, CVE-2017-5546, CVE-2017-5549,

CVE-2017-5550, CVE-2017-5551, CVE-2017-5576, CVE-2017-5669,

CVE-2017-5897, CVE-2017-5970, CVE-2017-6001, CVE-2017-6214,

CVE-2017-6345, CVE-2017-6346, CVE-2017-6347, CVE-2017-6348,

CVE-2017-7187, CVE-2017-7261, CVE-2017-7273, CVE-2017-7472,

CVE-2017-7616, CVE-2017-7618, CVE-2017-7645, CVE-2017-7889,

CVE-2017-7895, CVE-2017-8924, CVE-2017-8925, CVE-2017-9150

Severity
critical
Lowest
Low
Medium
High
Critical

July 21, 2017

Topics%20covered

Topics Covered

security advisory denial of service kernel update Ubuntu linux-hwe

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-27.30~16.04.2
https://launchpad.net/ubuntu/+source/linux-meta-hwe/4.10.0.27.30

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