The following updates has been released for Ubuntu:

Ubuntu Linux 14.04 LTS, 16.04 LTS, 17.04:
USN-3410-1: GD library vulnerability
USN-3411-1: Bazaar vulnerability

Ubuntu Linux 12.04 ESM:
USN-3410-2: GD library vulnerability

USN-3410-1: GD library vulnerability

==========================================================================
Ubuntu Security Notice USN-3410-1
September 05, 2017

libgd2 vulnerability
==========================================================================

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

GD library could be made to crash if it opened a specially crafted
file.

Software Description:
- libgd2: GD Graphics Library

Details:

It was discovered a double-free vulnerability in GD library.
A remote attacker could write arbitrary values in memory
spaces or made programs to crash.

Update instructions:

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

Ubuntu 17.04:
libgd-tools 2.2.4-2ubuntu0.3
libgd3 2.2.4-2ubuntu0.3

Ubuntu 16.04 LTS:
libgd-tools 2.1.1-4ubuntu0.16.04.8
libgd3 2.1.1-4ubuntu0.16.04.8

Ubuntu 14.04 LTS:
libgd-tools 2.1.0-3ubuntu0.8
libgd3 2.1.0-3ubuntu0.8

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

References:
https://www.ubuntu.com/usn/usn-3410-1
CVE-2017-6362

Package Information:
https://launchpad.net/ubuntu/+source/libgd2/2.2.4-2ubuntu0.3
https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.8
https://launchpad.net/ubuntu/+source/libgd2/2.1.0-3ubuntu0.8

USN-3410-2: GD library vulnerability

==========================================================================
Ubuntu Security Notice USN-3410-2
September 05, 2017

libgd2 vulnerability
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

GD library could be made to crash if it opened a specially crafted
file.

Software Description:
- libgd2: GD Graphics Library

Details:

USN-3410-1 fixed a vulnerability in GD Graphics Library.
This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that the GD Graphics Library (aka libgd) incorrectly
 handled certain malformed PNG images. A remote attacker could use this
 issue to cause the GD Graphics Library to crash, resulting in a denial
 of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 12.04 ESM:
  libgd-tools 2.0.36~rc1~dfsg-6ubuntu2.6
  libgd2-noxpm 2.0.36~rc1~dfsg-6ubuntu2.6
  libgd2-xpm 2.0.36~rc1~dfsg-6ubuntu2.6

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

References:
  https://www.ubuntu.com/usn/usn-3410-2
  https://www.ubuntu.com/usn/usn-3410-1
  CVE-2017-6362

USN-3411-1: Bazaar vulnerability

=========================================================================
Ubuntu Security Notice USN-3411-1
September 06, 2017

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Bazaar could be made run programs as your login if it opened a
specially crafted URL.

Software Description:
- bzr: easy to use distributed version control system

Details:

Adam Collard discovered that Bazaar did not properly handle host names
in 'bzr+ssh://' URLs. A remote attacker could use this to construct
a bazaar repository URL that when accessed could run arbitrary code
with the privileges of the user.

Update instructions:

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

Ubuntu 17.04:
bzr 2.7.0+bzr6619-7ubuntu0.1
python-bzrlib 2.7.0+bzr6619-7ubuntu0.1

Ubuntu 16.04 LTS:
bzr 2.7.0-2ubuntu3.1
python-bzrlib 2.7.0-2ubuntu3.1

Ubuntu 14.04 LTS:
bzr 2.6.0+bzr6593-1ubuntu1.6
python-bzrlib 2.6.0+bzr6593-1ubuntu1.6

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

References:
https://www.ubuntu.com/usn/usn-3411-1
https://launchpad.net/bugs/1710979

Package Information:
https://launchpad.net/ubuntu/+source/bzr/2.7.0+bzr6619-7ubuntu0.1
https://launchpad.net/ubuntu/+source/bzr/2.7.0-2ubuntu3.1
https://launchpad.net/ubuntu/+source/bzr/2.6.0+bzr6593-1ubuntu1.6