[USN-3411-2] Bazaar vulnerability

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Ubuntu Security Notice USN-3411-2
October 24, 2017

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

- Ubuntu 12.04 ESM

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:

USN-3411-1 fixed a vulnerability in Bazaar. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory 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 12.04 ESM:
  bzr                             2.5.1-0ubuntu2.1
  python-bzrlib                   2.5.1-0ubuntu2.1

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

References:
  https://www.ubuntu.com/usn/usn-3411-2
  https://www.ubuntu.com/usn/usn-3411-1
  CVE-2017-14176