USN-3189-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3189-1

3rd February, 2017

linux, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

linux
– Linux kernel
linux-raspi2
– Linux kernel for Raspberry Pi 2
linux-snapdragon
– Linux kernel for Snapdragon Processors

Details

Mikulas Patocka discovered that the asynchronous multibuffer cryptographic
daemon (mcryptd) in the Linux kernel did not properly handle being invoked
with incompatible algorithms. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-10147)

Qidan He discovered that the ICMP implementation in the Linux kernel did
not properly check the size of an ICMP header. A local attacker with
CAP_NET_ADMIN could use this to expose sensitive information.
(CVE-2016-8399)

Update instructions

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

Ubuntu 16.04 LTS:: linux-image-powerpc-smp 4.4.0.62.65; linux-image-powerpc-e500mc 4.4.0.62.65; linux-image-4.4.0-1042-raspi2

4.4.0-1042.49; linux-image-4.4.0-62-powerpc-e500mc

4.4.0-62.83; linux-image-4.4.0-62-lowlatency

4.4.0-62.83; linux-image-generic 4.4.0.62.65; linux-image-4.4.0-62-powerpc-smp

4.4.0-62.83; linux-image-4.4.0-62-powerpc64-smp

4.4.0-62.83; linux-image-lowlatency 4.4.0.62.65; linux-image-4.4.0-1046-snapdragon

4.4.0-1046.50; linux-image-4.4.0-62-powerpc64-emb

4.4.0-62.83; linux-image-powerpc64-smp 4.4.0.62.65; linux-image-generic-lpae 4.4.0.62.65; linux-image-snapdragon 4.4.0.1046.38; linux-image-4.4.0-62-generic

4.4.0-62.83; linux-image-4.4.0-62-generic-lpae

4.4.0-62.83; linux-image-powerpc64-emb 4.4.0.62.65; linux-image-raspi2 4.4.0.1042.41

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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-2016-10147,

CVE-2016-8399

Source: USN-3189-1: Linux kernel vulnerabilities

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