[config] Add basic config validators for path rewrite, host rewrite and redirect actions #10367
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Description: Reject path rewrite, host rewrite and redirect config fields that contain \0, \r or \n characters. This provides some basic protection against config errors that could result in problems due to the proxy, upstream and downstream disagreeing about the contents of headers.
Risk Level: medium
Testing: Added config tests that trigger on the new validations
Docs Changes: n/a
Release Notes: TBD
Fixes #10332