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MRF: Log sensible error for subdomains_regex

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Haelwenn (lanodan) Monnier 2024-01-02 15:12:33 +01:00
parent 47e00524f7
commit 6af49270a9
3 changed files with 24 additions and 3 deletions
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1
changelog.d/mrf-regex-error.fix Normal file
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@ -0,0 +1 @@
MRF: Log sensible error for subdomains_regex

13
lib/pleroma/web/activity_pub/mrf.ex
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@ -1,5 +1,5 @@
# Pleroma: A lightweight social networking server # Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/> # Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only # SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF do defmodule Pleroma.Web.ActivityPub.MRF do
@ -139,7 +139,16 @@ defmodule Pleroma.Web.ActivityPub.MRF do
@spec subdomains_regex([String.t()]) :: [Regex.t()] @spec subdomains_regex([String.t()]) :: [Regex.t()]
def subdomains_regex(domains) when is_list(domains) do def subdomains_regex(domains) when is_list(domains) do
for domain <- domains, do: ~r(^#{String.replace(domain, "*.", "(.*\\.)*")}$)i for domain <- domains do
try do
target = String.replace(domain, "*.", "(.*\\.)*")
~r<^#{target}$>i
rescue
e ->
Logger.error("MRF: Invalid subdomain Regex: #{domain}")
reraise e, __STACKTRACE__
end
end
end end
@spec subdomain_match?([Regex.t()], String.t()) :: boolean() @spec subdomain_match?([Regex.t()], String.t()) :: boolean()

13
test/pleroma/web/activity_pub/mrf_test.exs
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@ -1,10 +1,13 @@
# Pleroma: A lightweight social networking server # Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/> # Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only # SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRFTest do defmodule Pleroma.Web.ActivityPub.MRFTest do
use ExUnit.Case use ExUnit.Case
use Pleroma.Tests.Helpers use Pleroma.Tests.Helpers
import ExUnit.CaptureLog
alias Pleroma.Web.ActivityPub.MRF alias Pleroma.Web.ActivityPub.MRF
test "subdomains_regex/1" do test "subdomains_regex/1" do
@ -61,6 +64,14 @@ defmodule Pleroma.Web.ActivityPub.MRFTest do
refute MRF.subdomain_match?(regexes, "EXAMPLE.COM") refute MRF.subdomain_match?(regexes, "EXAMPLE.COM")
refute MRF.subdomain_match?(regexes, "example.com") refute MRF.subdomain_match?(regexes, "example.com")
end end
@tag capture_log: true
test "logs sensible error on accidental wildcard" do
assert_raise Regex.CompileError, fn ->
assert capture_log(MRF.subdomains_regex(["*unsafe.tld"])) =~
"MRF: Invalid subdomain Regex: *unsafe.tld"
end
end
end end
describe "instance_list_from_tuples/1" do describe "instance_list_from_tuples/1" do