Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[CVE-2016-2098] Possible remote code execution vulnerability in Action Pack #194

thesp0nge opened this issue Mar 1, 2016 · 0 comments


Copy link

@thesp0nge thesp0nge commented Mar 1, 2016

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:,,


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]

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 render
method. Instead, verify that data before passing it to the render method.

For example, change this:

def show
  render params[:id]

To this:

def show
  render verify_id(params[:id])

def verify_id(id)
  # add verification logic particular to your application here


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!

@thesp0nge thesp0nge added the bug label Mar 1, 2016
@thesp0nge thesp0nge self-assigned this Mar 1, 2016
thesp0nge added a commit that referenced this issue Mar 1, 2016
…xecution vulnerability in Action Pack
@thesp0nge thesp0nge closed this Mar 1, 2016
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
None yet
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
1 participant