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Alerts This Week
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Alerts This Week
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Ubuntu 16.10: USN-3147-1 Critical Kernel Issues And Fixes

ubuntu
Calendar Grey November 30, 2016
Scroller Ubuntu
An urgent security alert concerning kernel vulnerabilities in Ubuntu 16.10. Please ensure your system is updated to reduce potential threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Andreas Gruenbacher and Jan Kara discovered that the filesystem

implementation in the Linux kernel did not clear the setgid bit during a

setxattr call. A local attacker could use this to possibly elevate group

privileges. (CVE-2016-7097)

Marco Grassi discovered that the driver for Areca RAID Controllers in the

Linux kernel did not properly validate control messages. A local attacker

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

privileges. (CVE-2016-7425)

Topics%20covered

Topics Covered

security advisory privilege escalation kernel system update ubuntu crash

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-28-generic    4.8.0-28.30
  linux-image-4.8.0-28-generic-lpae  4.8.0-28.30
  linux-image-4.8.0-28-lowlatency  4.8.0-28.30
  linux-image-4.8.0-28-powerpc-e500mc  4.8.0-28.30
  linux-image-4.8.0-28-powerpc-smp  4.8.0-28.30
  linux-image-4.8.0-28-powerpc64-emb  4.8.0-28.30
  linux-image-generic             4.8.0.28.37
  linux-image-generic-lpae        4.8.0.28.37
  linux-image-lowlatency          4.8.0.28.37
  linux-image-powerpc-e500mc      4.8.0.28.37
  linux-image-powerpc-smp         4.8.0.28.37
  linux-image-powerpc64-emb       4.8.0.28.37

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

CVE-2016-7097, CVE-2016-7425

Severity
critical
Lowest
Low
Medium
High
Critical

November 30, 2016

Topics%20covered

Topics Covered

security advisory privilege escalation kernel system update ubuntu crash

Package Information

https://launchpad.net/ubuntu/+source/linux/4.8.0-28.30

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