[USN-3190-1] Linux kernel vulnerabilities

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3190-1
February 03, 2017

linux vulnerabilities
==========================================================================

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

- Ubuntu 16.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

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)

It was discovered that a use-after-free existed in the KVM susbsystem of
the Linux kernel when creating devices. A local attacker could use this to
cause a denial of service (system crash). (CVE-2016-10150)

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)

Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build()
function in the Linux kernel. A local attacker could use to cause a denial
of service (system crash) or possible execute arbitrary code with
administrative privileges. (CVE-2016-8632)

Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
did not properly restrict the VCPU index when I/O APIC is enabled, An
attacker in a guest VM could use this to cause a denial of service (system
crash) or possibly gain privileges in the host OS. (CVE-2016-9777)

Update instructions:

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

Ubuntu 16.10:
  linux-image-4.8.0-37-generic    4.8.0-37.39
  linux-image-4.8.0-37-generic-lpae  4.8.0-37.39
  linux-image-4.8.0-37-lowlatency  4.8.0-37.39
  linux-image-4.8.0-37-powerpc-e500mc  4.8.0-37.39
  linux-image-4.8.0-37-powerpc-smp  4.8.0-37.39
  linux-image-4.8.0-37-powerpc64-emb  4.8.0-37.39
  linux-image-generic             4.8.0.37.46
  linux-image-generic-lpae        4.8.0.37.46
  linux-image-lowlatency          4.8.0.37.46
  linux-image-powerpc-e500mc      4.8.0.37.46
  linux-image-powerpc-smp         4.8.0.37.46
  linux-image-powerpc64-emb       4.8.0.37.46

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:
  http://www.ubuntu.com/usn/usn-3190-1
  CVE-2016-10147, CVE-2016-10150, CVE-2016-8399, CVE-2016-8632,
  CVE-2016-9777

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.8.0-37.39

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