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Ubuntu 14.04 LTS USN-3291-3 Critical: Kernel Issues Fixed

ubuntu
Calendar Grey May 17, 2017
Dist Ubuntu Esm H88
The recent Ubuntu update resolves multiple kernel vulnerabilities that include potential denial of service threats and leaks of sensitive memory data.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

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

Details:

USN-3291-1 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.

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux

kernel contained a stack-based buffer overflow. A local attacker with

access to an sg device could use this to cause a denial of service (system

crash) or possibly execute arbitrary code. (CVE-2017-7187)

It was discovered that a NULL pointer dereference existed in the Direct

Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A

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

(CVE-2017-7261)

Li Qiang discovered that an integer overflow vulnerability existed in the

Direct Rendering Manager (DRM) ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service memory leak system update kernel issue ubuntu

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-78-generic    4.4.0-78.99~14.04.2
  linux-image-4.4.0-78-generic-lpae  4.4.0-78.99~14.04.2
  linux-image-4.4.0-78-lowlatency  4.4.0-78.99~14.04.2
  linux-image-4.4.0-78-powerpc-e500mc  4.4.0-78.99~14.04.2
  linux-image-4.4.0-78-powerpc-smp  4.4.0-78.99~14.04.2
  linux-image-4.4.0-78-powerpc64-emb  4.4.0-78.99~14.04.2
  linux-image-4.4.0-78-powerpc64-smp  4.4.0-78.99~14.04.2
  linux-image-generic-lpae-lts-xenial  4.4.0.78.63
  linux-image-generic-lts-xenial  4.4.0.78.63
  linux-image-lowlatency-lts-xenial  4.4.0.78.63
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.78.63
  linux-image-powerpc-smp-lts-xenial  4.4.0.78.63
  linux-image-powerpc64-emb-lts-xenial  4.4.0.78.63
  linux-image-powerpc64-smp-lts-xenial  4.4.0.78.63

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-3291-3

https://ubuntu.com/security/notices/USN-3291-1

CVE-2017-7187, CVE-2017-7261, CVE-2017-7294, CVE-2017-7616

Severity
critical
Lowest
Low
Medium
High
Critical

May 17, 2017

Topics%20covered

Topics Covered

security advisory denial of service memory leak system update kernel issue ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-78.99~14.04.2

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