The following updates has been released for Ubuntu Linux:

Ubuntu 12.04 ESM:
USN-3779-1: Linux kernel vulnerabilities

Ubuntu 18.04 LTS:
USN-3780-1: HAProxy vulnerability

USN-3779-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3779-1
October 02, 2018

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that an integer overflow vulnerability existed in the
Linux kernel when loading an executable to run. A local attacker could use
this to gain administrative privileges. (CVE-2018-14634)

It was discovered that a stack-based buffer overflow existed in the iSCSI
target implementation of the Linux kernel. A remote attacker could use this
to cause a denial of service (system crash). (CVE-2018-14633)

Update instructions:

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

Ubuntu 12.04 ESM:
linux-image-3.2.0-136-generic 3.2.0-136.182
linux-image-3.2.0-136-generic-pae 3.2.0-136.182
linux-image-3.2.0-136-highbank 3.2.0-136.182
linux-image-3.2.0-136-omap 3.2.0-136.182
linux-image-3.2.0-136-powerpc-smp 3.2.0-136.182
linux-image-3.2.0-136-powerpc64-smp 3.2.0-136.182
linux-image-3.2.0-136-virtual 3.2.0-136.182
linux-image-generic 3.2.0.136.151
linux-image-generic-pae 3.2.0.136.151
linux-image-highbank 3.2.0.136.151
linux-image-omap 3.2.0.136.151
linux-image-powerpc 3.2.0.136.151
linux-image-powerpc-smp 3.2.0.136.151
linux-image-powerpc64-smp 3.2.0.136.151

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://usn.ubuntu.com/usn/usn-3779-1
CVE-2018-14633, CVE-2018-14634

USN-3780-1: HAProxy vulnerability

==========================================================================
Ubuntu Security Notice USN-3780-1
October 02, 2018

haproxy vulnerability
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

HAProxy could be made to crash if it received a specially crafted
request.

Software Description:
- haproxy: fast and reliable load balancing reverse proxy

Details:

It was discovered that HAProxy incorrectly handled certain requests.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 18.04 LTS:
  haproxy 1.8.8-1ubuntu0.2

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3780-1
  CVE-2018-14645

Package Information:
  https://launchpad.net/ubuntu/+source/haproxy/1.8.8-1ubuntu0.2