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Home » Security Advisories» Ubuntu » Linux kernel (Xenial HWE) vulnerabilities

Linux kernel (Xenial HWE) vulnerabilities

  • Vendor: Ubuntu
  • Vendor ID: USN-3189-2
  • Date: February 03, 2017


==========================================================================
Ubuntu Security Notice USN-3189-2
February 03, 2017

linux-lts-xenial vulnerabilities
==========================================================================

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3189-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

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 versions:

Ubuntu 14.04 LTS:
linux-image-4.4.0-62-generic 4.4.0-62.83~14.04.1
linux-image-4.4.0-62-generic-lpae 4.4.0-62.83~14.04.1
linux-image-4.4.0-62-lowlatency 4.4.0-62.83~14.04.1
linux-image-4.4.0-62-powerpc-e500mc 4.4.0-62.83~14.04.1
linux-image-4.4.0-62-powerpc-smp 4.4.0-62.83~14.04.1
linux-image-4.4.0-62-powerpc64-emb 4.4.0-62.83~14.04.1
linux-image-4.4.0-62-powerpc64-smp 4.4.0-62.83~14.04.1
linux-image-generic-lpae-lts-xenial 4.4.0.62.48
linux-image-generic-lts-xenial 4.4.0.62.48
linux-image-lowlatency-lts-xenial 4.4.0.62.48
linux-image-powerpc-e500mc-lts-xenial 4.4.0.62.48
linux-image-powerpc-smp-lts-xenial 4.4.0.62.48
linux-image-powerpc64-emb-lts-xenial 4.4.0.62.48
linux-image-powerpc64-smp-lts-xenial 4.4.0.62.48

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-3189-2
http://www.ubuntu.com/usn/usn-3189-1
CVE-2016-10147, CVE-2016-8399

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-62.83~14.04.1

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