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|
# frozen_string_literal: true
require "abstract_unit"
require "ipaddr"
class HostAuthorizationTest < ActionDispatch::IntegrationTest
App = -> env { [200, {}, %w(Success)] }
test "blocks requests to unallowed host with empty body" do
@app = build_app(%w(only.com))
get "/"
assert_response :forbidden
assert_empty response.body
end
test "renders debug info when all requests considered as local" do
@app = build_app(%w(only.com))
get "/", env: { "action_dispatch.show_detailed_exceptions" => true }
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", response.body
end
test "allows all requests if hosts is empty" do
@app = build_app(nil)
get "/"
assert_response :ok
assert_equal "Success", body
end
test "hosts can be a single element array" do
@app = build_app(%w(www.example.com))
get "/"
assert_response :ok
assert_equal "Success", body
end
test "hosts can be a string" do
@app = build_app("www.example.com")
get "/"
assert_response :ok
assert_equal "Success", body
end
test "hosts are matched case insensitive" do
@app = build_app("Example.local")
get "/", env: {
"HOST" => "example.local",
}
assert_response :ok
assert_equal "Success", body
end
test "hosts are matched case insensitive with titlecased host" do
@app = build_app("example.local")
get "/", env: {
"HOST" => "Example.local",
}
assert_response :ok
assert_equal "Success", body
end
test "hosts are matched case insensitive with hosts array" do
@app = build_app(["Example.local"])
get "/", env: {
"HOST" => "example.local",
}
assert_response :ok
assert_equal "Success", body
end
test "regex matches are not title cased" do
@app = build_app([/www.Example.local/])
get "/", env: {
"HOST" => "www.example.local",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: www.example.local", response.body
end
test "passes requests to allowed hosts with domain name notation" do
@app = build_app(".example.com")
get "/"
assert_response :ok
assert_equal "Success", body
end
test "does not allow domain name notation in the HOST header itself" do
@app = build_app(".example.com")
get "/", env: {
"HOST" => ".example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: .example.com", response.body
end
test "checks for requests with #=== to support wider range of host checks" do
@app = build_app([-> input { input == "www.example.com" }])
get "/"
assert_response :ok
assert_equal "Success", body
end
test "mark the host when authorized" do
@app = build_app(".example.com")
get "/"
assert_equal "www.example.com", request.get_header("action_dispatch.authorized_host")
end
test "sanitizes regular expressions to prevent accidental matches" do
@app = build_app([/w.example.co/])
get "/", env: { "action_dispatch.show_detailed_exceptions" => true }
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", response.body
end
test "blocks requests to unallowed host supporting custom responses" do
@app = build_app(["w.example.co"], response_app: -> env do
[401, {}, %w(Custom)]
end)
get "/"
assert_response :unauthorized
assert_equal "Custom", body
end
test "localhost works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "localhost:3000",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV4 works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "127.0.0.1",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV4 with port works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "127.0.0.1:3000",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV4 binding in all addresses works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "0.0.0.0",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV4 with port binding in all addresses works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "0.0.0.0:3000",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV6 works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "[::1]",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV6 with port works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "[::1]:3000",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV6 binding in all addresses works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "[::]",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "localhost using IPV6 with port binding in all addresses works in dev" do
@app = build_app(ActionDispatch::HostAuthorization::ALLOWED_HOSTS_IN_DEVELOPMENT)
get "/", env: {
"HOST" => "[::]:3000",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "hosts with port works" do
@app = build_app(["host.test"])
get "/", env: {
"HOST" => "host.test:3000",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :ok
assert_match "Success", response.body
end
test "blocks requests with spoofed X-FORWARDED-HOST" do
@app = build_app([IPAddr.new("127.0.0.1")])
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "127.0.0.1",
"HOST" => "www.example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", response.body
end
test "blocks requests with spoofed relative X-FORWARDED-HOST" do
@app = build_app(["www.example.com"])
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "//randomhost.com",
"HOST" => "www.example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: //randomhost.com", response.body
end
test "forwarded secondary hosts are allowed when permitted" do
@app = build_app(".domain.com")
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "example.com, my-sub.domain.com",
"HOST" => "domain.com",
}
assert_response :ok
assert_equal "Success", body
end
test "forwarded secondary hosts are blocked when mismatch" do
@app = build_app("domain.com")
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "domain.com, evil.com",
"HOST" => "domain.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: evil.com", response.body
end
test "does not consider IP addresses in X-FORWARDED-HOST spoofed when disabled" do
@app = build_app(nil)
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "127.0.0.1",
"HOST" => "www.example.com",
}
assert_response :ok
assert_equal "Success", body
end
test "detects localhost domain spoofing" do
@app = build_app("localhost")
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "localhost",
"HOST" => "www.example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", response.body
end
test "forwarded hosts should be permitted" do
@app = build_app("domain.com")
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "sub.domain.com",
"HOST" => "domain.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: sub.domain.com", response.body
end
test "sub-sub domains should not be permitted" do
@app = build_app(".domain.com")
get "/", env: {
"HOST" => "secondary.sub.domain.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: secondary.sub.domain.com", response.body
end
test "forwarded hosts are allowed when permitted" do
@app = build_app(".domain.com")
get "/", env: {
"HTTP_X_FORWARDED_HOST" => "my-sub.domain.com",
"HOST" => "domain.com",
}
assert_response :ok
assert_equal "Success", body
end
test "lots of NG hosts" do
ng_hosts = [
"hacker%E3%80%82com",
"hacker%00.com",
"www.theirsite.com@yoursite.com",
"hacker.com/test/",
"hacker%252ecom",
".hacker.com",
"/\/\/hacker.com/",
"/hacker.com",
"../hacker.com",
".hacker.com",
"@hacker.com",
"hacker.com",
"hacker.com%23@example.com",
"hacker.com/.jpg",
"hacker.com\texample.com/",
"hacker.com/example.com",
"hacker.com\@example.com",
"hacker.com/example.com",
"hacker.com/"
]
@app = build_app("example.com")
ng_hosts.each do |host|
get "/", env: {
"HTTP_X_FORWARDED_HOST" => host,
"HOST" => "example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: #{host}", response.body
end
end
test "exclude matches allow any host" do
@app = build_app("only.com", exclude: ->(req) { req.path == "/foo" })
get "/foo"
assert_response :ok
assert_equal "Success", body
end
test "exclude misses block unallowed hosts" do
@app = build_app("only.com", exclude: ->(req) { req.path == "/bar" })
get "/foo", env: { "action_dispatch.show_detailed_exceptions" => true }
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", response.body
end
test "blocks requests with invalid hostnames" do
@app = build_app(".example.com")
get "/", env: {
"HOST" => "attacker.com#x.example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: attacker.com#x.example.com", response.body
end
test "blocks requests to similar host" do
@app = build_app("sub.example.com")
get "/", env: {
"HOST" => "sub-example.com",
"action_dispatch.show_detailed_exceptions" => true
}
assert_response :forbidden
assert_match "Blocked hosts: sub-example.com", response.body
end
test "uses logger from the env" do
@app = build_app(%w(only.com))
output = StringIO.new
get "/", env: { "action_dispatch.logger" => Logger.new(output) }
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", output.rewind && output.read
end
test "uses ActionView::Base logger when no logger in the env" do
@app = build_app(%w(only.com))
output = StringIO.new
logger = Logger.new(output)
_old, ActionView::Base.logger = ActionView::Base.logger, logger
begin
get "/"
ensure
ActionView::Base.logger = _old
end
assert_response :forbidden
assert_match "Blocked hosts: www.example.com", output.rewind && output.read
end
private
def build_app(hosts, exclude: nil, response_app: nil)
Rack::Lint.new(
ActionDispatch::HostAuthorization.new(
Rack::Lint.new(App), hosts, exclude: exclude, response_app: response_app
)
)
end
end
|
