rails - security update

Two vulnerabilities have been discovered in Rails, a web application
framework written in Ruby. Both vulnerabilities affect Action Pack, which
handles the web requests for Rails.

• CVE-2016-2097
  Crafted requests to Action View, one of the components of Action Pack,
  might result in rendering files from arbitrary locations, including
  files beyond the application’s view directory. This vulnerability is
  the result of an incomplete fix of
  CVE-2016-0752.
  This bug was found by Jyoti Singh and Tobias Kraze from Makandra.
• CVE-2016-2098
  If a web applications does not properly sanitize user inputs, an
  attacker might control the arguments of the render method in a
  controller or a view, resulting in the possibility of executing
  arbitrary ruby code.
  This bug was found by Tobias Kraze from Makandra and joernchen of
  Phenoelit.

For the stable distribution (jessie), these problems have been fixed in
version 2:4.1.8-1+deb8u2.

For the testing distribution (stretch), these problems have been fixed
in version 2:4.2.5.2-1.

For the unstable distribution (sid), these problems have been fixed in
version 2:4.2.5.2-1.

We recommend that you upgrade your rails packages.