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=========================================================================Ubuntu Security Notice USN-3443-1
October 10, 2017

linux, linux-raspi2 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04

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 on the PowerPC architecture, the kernel did not
properly sanitize the signal stack when handling sigreturn(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-1000255)

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 17.04:
  linux-image-4.10.0-1019-raspi2  4.10.0-1019.22
  linux-image-4.10.0-37-generic   4.10.0-37.41
  linux-image-4.10.0-37-generic-lpae  4.10.0-37.41
  linux-image-4.10.0-37-lowlatency  4.10.0-37.41
  linux-image-generic             4.10.0.37.37
  linux-image-generic-lpae        4.10.0.37.37
  linux-image-lowlatency          4.10.0.37.37
  linux-image-powerpc-e500mc      4.10.0.37.37
  linux-image-powerpc-smp         4.10.0.37.37
  linux-image-powerpc64-emb       4.10.0.37.37
  linux-image-powerpc64-smp       4.10.0.37.37
  linux-image-raspi2              4.10.0.1019.20
  linux-image-virtual             4.10.0.37.37

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:
  https://ubuntu.com/security/notices/USN-3443-1
  CVE-2017-1000255, CVE-2017-14106

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.10.0-37.41
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.10.0-1019.22

Ubuntu 3443-1: Linux kernel vulnerabilities

October 10, 2017
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: linux-image-4.10.0-1019-raspi2 4.10.0-1019.22 linux-image-4.10.0-37-generic 4.10.0-37.41 linux-image-4.10.0-37-generic-lpae 4.10.0-37.41 linux-image-4.10.0-37-lowlatency 4.10.0-37.41 linux-image-generic 4.10.0.37.37 linux-image-generic-lpae 4.10.0.37.37 linux-image-lowlatency 4.10.0.37.37 linux-image-powerpc-e500mc 4.10.0.37.37 linux-image-powerpc-smp 4.10.0.37.37 linux-image-powerpc64-emb 4.10.0.37.37 linux-image-powerpc64-smp 4.10.0.37.37 linux-image-raspi2 4.10.0.1019.20 linux-image-virtual 4.10.0.37.37 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

https://ubuntu.com/security/notices/USN-3443-1

CVE-2017-1000255, CVE-2017-14106

Severity
October 10, 2017

Package Information

https://launchpad.net/ubuntu/+source/linux/4.10.0-37.41 https://launchpad.net/ubuntu/+source/linux-raspi2/4.10.0-1019.22

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