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Ubuntu 14.04 LTS Security Advisory USN-3420-2 Critical Denial of Service

ubuntu
Calendar Grey September 18, 2017
Dist Ubuntu Esm H88
Tackling essential updates in the Linux kernel for Ubuntu 14.04 LTS, focusing on vulnerabilities like buffer overflow and denial of service threats.
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-3420-1 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 buffer overflow existed in the Bluetooth stack of

the Linux kernel when handling L2CAP configuration responses. A physically

proximate attacker could use this to cause a denial of service (system

crash). (CVE-2017-1000251)

It was discovered that the Flash-Friendly File System (f2fs) implementation

in the Linux kernel did not properly validate superblock metadata. A local

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2017-10663)

It was discovered that a buffer overflow existed in the ioctl handling code

in the ISDN subsys...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical ubuntu linux kernel

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-96-generic    4.4.0-96.119~14.04.1
  linux-image-4.4.0-96-generic-lpae  4.4.0-96.119~14.04.1
  linux-image-4.4.0-96-lowlatency  4.4.0-96.119~14.04.1
  linux-image-4.4.0-96-powerpc-e500mc  4.4.0-96.119~14.04.1
  linux-image-4.4.0-96-powerpc-smp  4.4.0-96.119~14.04.1
  linux-image-4.4.0-96-powerpc64-emb  4.4.0-96.119~14.04.1
  linux-image-4.4.0-96-powerpc64-smp  4.4.0-96.119~14.04.1
  linux-image-generic-lpae-lts-xenial  4.4.0.96.80
  linux-image-generic-lts-xenial  4.4.0.96.80
  linux-image-lowlatency-lts-xenial  4.4.0.96.80
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.96.80
  linux-image-powerpc-smp-lts-xenial  4.4.0.96.80
  linux-image-powerpc64-emb-lts-xenial  4.4.0.96.80
  linux-image-powerpc64-smp-lts-xenial  4.4.0.96.80

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-3420-2

https://ubuntu.com/security/notices/USN-3420-1

CVE-2017-1000251, CVE-2017-10663, CVE-2017-12762, CVE-2017-8831

Severity
critical
Lowest
Low
Medium
High
Critical

September 18, 2017

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-96.119~14.04.1

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