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Ubuntu 16.10 USN-3292-1 Critical: Kernel Heap Overflow Risk

ubuntu
Calendar Grey May 17, 2017
Dist Ubuntu Esm H88
An urgent security bulletin for Ubuntu 16.10 has been issued, targeting a kernel vulnerability that may lead to possible system failures and additional risks.
The system could be made to crash or run programs as an administrator.

Summary

The system could be made to crash or run programs as an administrator.

Software Description:

- linux: Linux kernel

- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Jason Donenfeld discovered a heap overflow in the MACsec module in the

Linux kernel. An attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service heap overflow kernel ubuntu administrator access

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-1036-raspi2   4.8.0-1036.39
  linux-image-4.8.0-52-generic    4.8.0-52.55
  linux-image-4.8.0-52-generic-lpae  4.8.0-52.55
  linux-image-4.8.0-52-lowlatency  4.8.0-52.55
  linux-image-4.8.0-52-powerpc-e500mc  4.8.0-52.55
  linux-image-4.8.0-52-powerpc-smp  4.8.0-52.55
  linux-image-4.8.0-52-powerpc64-emb  4.8.0-52.55
  linux-image-generic             4.8.0.52.64
  linux-image-generic-lpae        4.8.0.52.64
  linux-image-lowlatency          4.8.0.52.64
  linux-image-powerpc-e500mc      4.8.0.52.64
  linux-image-powerpc-smp         4.8.0.52.64
  linux-image-powerpc64-emb       4.8.0.52.64
  linux-image-raspi2              4.8.0.1036.40

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-3292-1

CVE-2017-7477

Severity
critical
Lowest
Low
Medium
High
Critical

May 17, 2017

Topics%20covered

Topics Covered

security advisory denial of service heap overflow kernel ubuntu administrator access

Package Information

https://launchpad.net/ubuntu/+source/linux/4.8.0-52.55
https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1036.39

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