USN-3411-1: Bazaar vulnerability

6 September 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


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


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

To update your system, please follow these instructions:

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