# \[SECURITY\] Rack 0.9.1, a modular Ruby webserver interface

**URL:** <https://www.ruby-forum.com/t/security-rack-0-9-1-a-modular-ruby-webserver-interface/157350>\
**Category:** Ruby\
**Created:** [January 9, 2009, 6:01pm UTC](https://www.ruby-forum.com/t/security-rack-0-9-1-a-modular-ruby-webserver-interface/157350 "2009-01-09T18:01:54Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![cneuhaus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/34f0e0/32.png) [@cneuhaus](https://www.ruby-forum.com/u/cneuhaus)\
**Post date:** [January 9, 2009, 6:01pm UTC](https://www.ruby-forum.com/t/security-rack-0-9-1-a-modular-ruby-webserver-interface/157350/1 "2009-01-09T18:01:54Z")

</div>

Hello,

Today we release Rack 0.9.1. This release is a _security release_, it  
only fixes directory traversal exploits in Rack::File and  
Rack::Directory, dating back to Rack 0.3. Updating is highly  
recommended if you use these modules.

= Rack, a modular Ruby webserver interface

Rack provides a minimal, modular and adaptable interface for developing  
web applications in Ruby. By wrapping HTTP requests and responses in  
the simplest way possible, it unifies and distills the API for web  
servers, web frameworks, and software in between (the so-called  
middleware) into a single method call.

The exact details of this are described in the Rack specification,  
which all Rack applications should conform to.

== Changes

- January 9th, 2009: Sixth public release 0.9.1.
  - Fix directory traversal exploits in Rack::File and Rack::Directory.

== Where can I get it?

You can download Rack 0.9.1 at

```
    http://chneukirchen.org/releases/rack-0.9.1.tar.gz
              http://rubyforge.org/projects/rack

```

Alternatively, you can checkout from the development repository with:

```
git clone git://github.com/rack/rack.git
cd rack && git checkout rack-0.9 # for this release

```

== Installing with RubyGems

A Gem of Rack is available. You can install it with:

```
gem install rack

```

I also provide a local mirror of the gems (and development snapshots)  
at my site:

```
gem install rack --source http://chneukirchen.org/releases/gems/

```

== Contact

Please mail bugs, suggestions and patches to  
[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid).

Mailing list archives are available at  
[http://groups.google.com/group/rack-devel](http://groups.google.com/group/rack-devel).

There is a bug tracker at [http://rack.lighthouseapp.com/](http://rack.lighthouseapp.com/).

Git repository (patches rebased on master are most welcome):

- [GitHub - rack/rack: A modular Ruby web server interface.](http://github.com/rack/rack)
- [http://git.vuxu.org/cgi-bin/gitweb.cgi?p=rack.git](http://git.vuxu.org/cgi-bin/gitweb.cgi?p=rack.git)

You are also welcome to join the #rack channel on [irc.freenode.net](http://irc.freenode.net).

== Thanks

The Rack Core Team, consisting of

- Christian N. (chneukirchen)
- James T. (raggi)
- Josh P. (josh)
- Michael F. (manveru)
- Ryan T. (rtomayko)
- Scytrin dai Kinthra (scytrin)

would like to thank:

- Tom R., for finding and reporting these bugs.

== Copyright

Copyright (C) 2007, 2008, 2009 Christian N.  
[http://purl.org/net/chneukirchen](http://purl.org/net/chneukirchen)

Rack is freely distributable under the terms of an MIT-style license.

== Links

Rack:: [http://rack.rubyforge.org/](http://rack.rubyforge.org/)  
Rack’s Rubyforge project:: [http://rubyforge.org/projects/rack](http://rubyforge.org/projects/rack)  
Official Rack repositories:: [http://github.com/rack](http://github.com/rack)  
rack-devel mailing list:: [http://groups.google.com/group/rack-devel](http://groups.google.com/group/rack-devel)

Happy hacking and have a nice day,  
Christian N.  
on behalf of the Rack Core Team.

237e24207b39c384d78c266d86bbf2a0808dc417 rack-0.9.1.tar.gz  
d3383a4b4abfc2de43df69d1fd7f24995a6e5fe4 rack-0.9.1.gem