Play Framework, when run in dev mode, shows verbose errors for easy debugging, including an exception stack trace. Play does this by configuring its DefaultHttpErrorHandler
to do so based on the application mode. In its Scala API Play also provides a static object DefaultHttpErrorHandler
that is configured to always show verbose errors. This is used as a default value in some Play APIs, so it is possible to inadvertently use this version in production. It is also possible to improperly configure the DefaultHttpErrorHandler
object instance as the injected error handler. Both of these situations could result in verbose errors displaying to users in a production application, which could expose sensitive information from the application.
In particular the constructor for CORSFilter
and apply
method for CORSActionBuilder
use the static object DefaultHttpErrorHandler
as a default value.
This is patched in Play Framework 2.8.16. The DefaultHttpErrorHandler
object has been changed to use the prod-mode behavior, and DevHttpErrorHandler
has been introduced for the dev-mode behavior.
When constructing a CORSFilter
or CORSActionBuilder
, ensure that a properly-configured error handler is passed. Generally this should be done by using the HttpErrorHandler
instance provided through dependency injection or through Play's BuiltInComponents
. Ensure that your application is not using the DefaultHttpErrorHandler
static object in any code that may be run in production.
https://www.playframework.com/documentation/2.8.x/ScalaErrorHandling#Supplying-a-custom-error-handler https://www.playframework.com/documentation/2.8.x/JavaErrorHandling#Supplying-a-custom-error-handler
If you have any questions or comments about this advisory: * Open an issue in playframework/playframework * Email us at example email address
{ "nvd_published_at": "2022-06-02T18:15:00Z", "github_reviewed_at": "2022-06-03T22:19:23Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-209" ] }