CVSS v3.x: 7.3 (High)
- >= 5.0.0.beta1
- ~> 126.96.36.199
- ~> 4.2.5, >= 188.8.131.52
- ~> 4.1.14, >= 184.108.40.206
There is a possible remote code execution vulnerability in Action Pack. This vulnerability has been assigned the CVE identifier CVE-2016-2098.
Versions Affected: 3.2.x, 4.0.x, 4.1.x, 4.2.x Not affected: 5.0+ Fixed Versions: 220.127.116.11, 18.104.22.168, 22.214.171.124
Applications that pass unverified user input to the
render method in a
controller or a view may be vulnerable to a code injection.
Impacted code will look like this:
class TestController < ApplicationController def show render params[:id] end end
An attacker could use the request parameters to coerce the above example to execute arbitrary ruby code.
All users running an affected release should either upgrade or use one of the workarounds immediately.
The FIXED releases are available at the normal locations.
A workaround to this issue is to not pass arbitrary user input to the
method. Instead, verify that data before passing it to the
For example, change this:
def index render params[:id] end
def index render verify_template(params[:id]) end private def verify_template(name) # add verification logic particular to your application here end
To aid users who aren’t able to upgrade immediately we have provided a patch for it. It is in git-am format and consist of a single changeset.
- 3-2-secure_inline_with_params.patch - Patch for 3.2 series
- 4-1-secure_inline_with_params.patch - Patch for 4.1 series
- 4-2-secure_inline_with_params.patch - Patch for 4.2 series
Thanks to both Tobias Kraze from makandra and joernchen of Phenoelit for reporting this!