=========================================================================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://ubuntu.com/security/notices/USN-3411-1
  https://bugs.launchpad.net/bzr/+bug/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