- < 2.0.0
- ~> 188.8.131.52
- ~> 5.2.6
- ~> 184.108.40.206
- >= 220.127.116.11
There is a possible information disclosure / unintended method execution vulnerability in Action Pack which has been assigned the CVE identifier CVE-2021-22885.
Versions Affected: >= 2.0.0. Not affected: < 2.0.0. Fixed Versions: 18.104.22.168, 22.214.171.124, 126.96.36.199, 5.2.6
There is a possible information disclosure / unintended method execution
vulnerability in Action Pack when using the
helper with untrusted user input.
Vulnerable code will look like this:
All users running an affected release should either upgrade or use one of the workarounds immediately.
To work around this problem, it is recommended to use an allow list for valid parameters passed from the user. For example:
private def check(param) case param when "valid" param else "/" end end def index redirect_to(check(params[:some_param])) end
Or force the user input to be cast to a string like this:
def index redirect_to(params[:some_param].to_s) end