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Ubuntu 16.10: USN-3359-1 Critical: Linux Kernel Security Risks

ubuntu
Calendar Grey July 20, 2017
Dist Ubuntu Esm H88
Tackling various vulnerabilities within Ubuntu's Linux kernel to safeguard against possible threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

It was discovered that the Linux kernel did not properly initialize a Wake-on-Lan data structure. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2014-9900)

Dmitry Vyukov, Andrey Konovalov, Florian Westphal, and Eric Dumazet

discovered that the netfiler subsystem in the Linux kernel mishandled IPv6

packet reassembly. A local user could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2016-9755)

Alexander Potapenko discovered a race condition in the Advanced Linux Sound

Architecture (ALSA) subsystem in the Linux kernel. A local attacker could

use this to expose sensitive information (kernel memory).

(CVE-2017-1000380)

It was discovered that the Linux kernel did not clear the setgid bit during

a setxattr call on a tmpfs...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory DoS attack Ubuntu critical severity kernel issues memory exposure

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-1043-raspi2   4.8.0-1043.47
  linux-image-4.8.0-59-generic    4.8.0-59.64
  linux-image-4.8.0-59-generic-lpae  4.8.0-59.64
  linux-image-4.8.0-59-lowlatency  4.8.0-59.64
  linux-image-4.8.0-59-powerpc-e500mc  4.8.0-59.64
  linux-image-4.8.0-59-powerpc-smp  4.8.0-59.64
  linux-image-4.8.0-59-powerpc64-emb  4.8.0-59.64
  linux-image-generic             4.8.0.59.72
  linux-image-generic-lpae        4.8.0.59.72
  linux-image-lowlatency          4.8.0.59.72
  linux-image-powerpc-e500mc      4.8.0.59.72
  linux-image-powerpc-smp         4.8.0.59.72
  linux-image-powerpc64-emb       4.8.0.59.72
  linux-image-raspi2              4.8.0.1043.47

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-3359-1

CVE-2014-9900, CVE-2016-9755, CVE-2017-1000380, CVE-2017-5551,

CVE-2017-5576, CVE-2017-7346, CVE-2017-7895, CVE-2017-8924,

CVE-2017-8925, CVE-2017-9150, CVE-2017-9605

Severity
critical
Lowest
Low
Medium
High
Critical

July 20, 2017

Topics%20covered

Topics Covered

security advisory DoS attack Ubuntu critical severity kernel issues memory exposure

Package Information

https://launchpad.net/ubuntu/+source/linux/4.8.0-59.64
https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1043.47

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