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Ubuntu 16.04 LTS USN-3291-1 Critical: Kernel DoS and Security Issues

ubuntu
Calendar Grey May 17, 2017
Dist Ubuntu Esm H88
A series of essential kernel security updates for Ubuntu 16.04 LTS, tackling significant flaws and threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

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) driver for VMWare devices in the Linux

kernel. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2017-7294)

It was discovered that an information leak existed in the set_mempolicy and

mbind compat sys...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical issue information leak buffer overflow kernel update ubuntu

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-78-generic    4.4.0-78.99
  linux-image-4.4.0-78-generic-lpae  4.4.0-78.99
  linux-image-4.4.0-78-lowlatency  4.4.0-78.99
  linux-image-4.4.0-78-powerpc-e500mc  4.4.0-78.99
  linux-image-4.4.0-78-powerpc-smp  4.4.0-78.99
  linux-image-4.4.0-78-powerpc64-emb  4.4.0-78.99
  linux-image-4.4.0-78-powerpc64-smp  4.4.0-78.99
  linux-image-generic             4.4.0.78.84
  linux-image-generic-lpae        4.4.0.78.84
  linux-image-lowlatency          4.4.0.78.84
  linux-image-powerpc-e500mc      4.4.0.78.84
  linux-image-powerpc-smp         4.4.0.78.84
  linux-image-powerpc64-emb       4.4.0.78.84
  linux-image-powerpc64-smp       4.4.0.78.84

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-3291-1

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

Severity
critical
Lowest
Low
Medium
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Critical

May 17, 2017

Topics%20covered

Topics Covered

security advisory denial of service critical issue information leak buffer overflow kernel update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-78.99

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