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Ubuntu 14.04 LTS: 3405-2 Moderate: Kernel Denial Of Service Threat

ubuntu
Calendar Grey August 28, 2017
Dist Ubuntu Esm H88
Several vulnerabilities detected and resolved in Ubuntu's Linux core, necessitating prompt system upgrades for users.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3405-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu

14.04 LTS.

It was discovered that a use-after-free vulnerability existed in the POSIX

message queue implementation in the Linux kernel. A local attacker could

use this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2017-11176)

Huang Weller discovered that the ext4 filesystem implementation in the

Linux kernel mishandled a needs-flushing-before-commit list. A local

attacker could use this to expose sensitive information. (CVE-2017-7495)

It was discovered that a buffer overflow existed in the Broadcom FullMAC

WLAN driver in the Linux kernel. A local attacker could use this to cause a

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow ubuntu linux kernel use-after-free hardware enablement

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-93-generic    4.4.0-93.116~14.04.1
  linux-image-4.4.0-93-generic-lpae  4.4.0-93.116~14.04.1
  linux-image-4.4.0-93-lowlatency  4.4.0-93.116~14.04.1
  linux-image-4.4.0-93-powerpc-e500mc  4.4.0-93.116~14.04.1
  linux-image-4.4.0-93-powerpc-smp  4.4.0-93.116~14.04.1
  linux-image-4.4.0-93-powerpc64-emb  4.4.0-93.116~14.04.1
  linux-image-4.4.0-93-powerpc64-smp  4.4.0-93.116~14.04.1
  linux-image-generic-lpae-lts-xenial  4.4.0.93.77
  linux-image-generic-lts-xenial  4.4.0.93.77
  linux-image-lowlatency-lts-xenial  4.4.0.93.77
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.93.77
  linux-image-powerpc-smp-lts-xenial  4.4.0.93.77
  linux-image-powerpc64-emb-lts-xenial  4.4.0.93.77
  linux-image-powerpc64-smp-lts-xenial  4.4.0.93.77

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-3405-2

https://ubuntu.com/security/notices/USN-3405-1

CVE-2015-7837, CVE-2017-11176, CVE-2017-7495, CVE-2017-7541

August 28, 2017

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow ubuntu linux kernel use-after-free hardware enablement

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-93.116~14.04.1

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