XSS Vulnerability in the `sanitize` helper of Ruby on Rails
There is an XSS vulnerability in the sanitize helper in Ruby on Rails. This vulnerability has been assigned the CVE identifier CVE-2013-1857.
Versions Affected: All.
Not affected: None.
Fixed Versions: 3.2.13, 3.1.12, 2.3.18
All users running an affected release should either upgrade or use one of the work arounds immediately.
The 3.2.13 and 3.1.12 releases are available at the normal locations.
If you are unable to upgrade, you can place the following code into a file in config/initializers and it will replace the method with the correct implementation.
self.protocol_separator = /:|(�*58)|(p)|(�*3a)|(%|%)3A/i
def contains_bad_protocols?(attr_name, value)
(value =~ /(^[^\/:]*):|(�*58)|(p)|(�*3a)|(%|%)3A/i && !allowed_protocols.include?(value.split(protocol_separator).first.downcase.strip))
To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.
* 3-2-sanitize_protocol.patch - Patch for 3.2 series
* 3-1-sanitize_protocol.patch - Patch for 3.1 series
* 3-0-sanitize_protocol.patch - Patch for 3.0 series
* 2-3-sanitize_protocol.patch - Patch for 2.3 series
Please note that only the 3.1.x and 3.2.x series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible as we cannot guarantee the continued availability of security fixes for unsupported releases.
Thanks to Alan Jenkins <alan.christo...@gmail.com
> for reporting the
vulnerability to us.