[USN-3399-1] cvs vulnerability

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Ubuntu Security Notice USN-3399-1
August 21, 2017

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

cvs could be made run programs as your login if it opened a
specially crafted cvs repository.

Software Description:
- cvs: Concurrent Versions System

Details:

Hank Leininger discovered that cvs did not properly handle SSH
for remote repositories. A remote attacker could use this to
construct a cvs repository 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:
  cvs                             2:1.12.13+real-22ubuntu0.1

Ubuntu 16.04 LTS:
  cvs                             2:1.12.13+real-15ubuntu0.1

Ubuntu 14.04 LTS:
  cvs                             2:1.12.13+real-12ubuntu0.1

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

References:
  https://www.ubuntu.com/usn/usn-3399-1
  CVE-2017-12836

Package Information:
  https://launchpad.net/ubuntu/+source/cvs/2:1.12.13+real-22ubuntu0.1
  https://launchpad.net/ubuntu/+source/cvs/2:1.12.13+real-15ubuntu0.1
  https://launchpad.net/ubuntu/+source/cvs/2:1.12.13+real-12ubuntu0.1