From 1c699144d23aa4a86ff8b6ebef7d760ce9e3a4e2 Mon Sep 17 00:00:00 2001 From: Lain Soykaf Date: Mon, 27 May 2024 21:26:40 +0400 Subject: [PATCH 1/4] HttpSecurityPlug: Don't allow unsafe-eval by default --- config/config.exs | 3 +- config/test.exs | 1 + lib/pleroma/application.ex | 7 +- lib/pleroma/web/plugs/http_security_plug.ex | 49 +++-- .../web/plugs/http_security_plug_test.exs | 208 ++++++++++++++---- 5 files changed, 204 insertions(+), 64 deletions(-) diff --git a/config/config.exs b/config/config.exs index 4752bbbde..f861daf04 100644 --- a/config/config.exs +++ b/config/config.exs @@ -519,7 +519,8 @@ config :pleroma, :http_security, sts: false, sts_max_age: 31_536_000, ct_max_age: 2_592_000, - referrer_policy: "same-origin" + referrer_policy: "same-origin", + allow_unsafe_eval: false config :cors_plug, max_age: 86_400, diff --git a/config/test.exs b/config/test.exs index 3345bb3a9..b5c9c6e4a 100644 --- a/config/test.exs +++ b/config/test.exs @@ -154,6 +154,7 @@ config :pleroma, Pleroma.Upload, config_impl: Pleroma.UnstubbedConfigMock config :pleroma, Pleroma.ScheduledActivity, config_impl: Pleroma.UnstubbedConfigMock config :pleroma, Pleroma.Web.RichMedia.Helpers, config_impl: Pleroma.StaticStubbedConfigMock config :pleroma, Pleroma.Uploaders.IPFS, config_impl: Pleroma.UnstubbedConfigMock +config :pleroma, Pleroma.Web.Plugs.HTTPSecurityPlug, config_impl: Pleroma.UnstubbedConfigMock peer_module = if String.to_integer(System.otp_release()) >= 25 do diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex index d266d1836..0d9757b44 100644 --- a/lib/pleroma/application.ex +++ b/lib/pleroma/application.ex @@ -14,6 +14,7 @@ defmodule Pleroma.Application do @name Mix.Project.config()[:name] @version Mix.Project.config()[:version] @repository Mix.Project.config()[:source_url] + @compile_env Mix.env() def name, do: @name def version, do: @version @@ -51,7 +52,11 @@ defmodule Pleroma.Application do Pleroma.HTML.compile_scrubbers() Pleroma.Config.Oban.warn() Config.DeprecationWarnings.warn() - Pleroma.Web.Plugs.HTTPSecurityPlug.warn_if_disabled() + + if @compile_env != :test do + Pleroma.Web.Plugs.HTTPSecurityPlug.warn_if_disabled() + end + Pleroma.ApplicationRequirements.verify!() load_custom_modules() Pleroma.Docs.JSON.compile() diff --git a/lib/pleroma/web/plugs/http_security_plug.ex b/lib/pleroma/web/plugs/http_security_plug.ex index a27dcd0ab..a1dc6c02a 100644 --- a/lib/pleroma/web/plugs/http_security_plug.ex +++ b/lib/pleroma/web/plugs/http_security_plug.ex @@ -3,26 +3,27 @@ # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do - alias Pleroma.Config import Plug.Conn require Logger + @config_impl Application.compile_env(:pleroma, [__MODULE__, :config_impl], Pleroma.Config) + def init(opts), do: opts def call(conn, _options) do - if Config.get([:http_security, :enabled]) do + if @config_impl.get([:http_security, :enabled]) do conn |> merge_resp_headers(headers()) - |> maybe_send_sts_header(Config.get([:http_security, :sts])) + |> maybe_send_sts_header(@config_impl.get([:http_security, :sts])) else conn end end def primary_frontend do - with %{"name" => frontend} <- Config.get([:frontends, :primary]), - available <- Config.get([:frontends, :available]), + with %{"name" => frontend} <- @config_impl.get([:frontends, :primary]), + available <- @config_impl.get([:frontends, :available]), %{} = primary_frontend <- Map.get(available, frontend) do {:ok, primary_frontend} end @@ -37,8 +38,8 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do end def headers do - referrer_policy = Config.get([:http_security, :referrer_policy]) - report_uri = Config.get([:http_security, :report_uri]) + referrer_policy = @config_impl.get([:http_security, :referrer_policy]) + report_uri = @config_impl.get([:http_security, :report_uri]) custom_http_frontend_headers = custom_http_frontend_headers() headers = [ @@ -86,10 +87,10 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do @csp_start [Enum.join(static_csp_rules, ";") <> ";"] defp csp_string do - scheme = Config.get([Pleroma.Web.Endpoint, :url])[:scheme] + scheme = @config_impl.get([Pleroma.Web.Endpoint, :url])[:scheme] static_url = Pleroma.Web.Endpoint.static_url() websocket_url = Pleroma.Web.Endpoint.websocket_url() - report_uri = Config.get([:http_security, :report_uri]) + report_uri = @config_impl.get([:http_security, :report_uri]) img_src = "img-src 'self' data: blob:" media_src = "media-src 'self'" @@ -97,8 +98,8 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do # Strict multimedia CSP enforcement only when MediaProxy is enabled {img_src, media_src, connect_src} = - if Config.get([:media_proxy, :enabled]) && - !Config.get([:media_proxy, :proxy_opts, :redirect_on_failure]) do + if @config_impl.get([:media_proxy, :enabled]) && + !@config_impl.get([:media_proxy, :proxy_opts, :redirect_on_failure]) do sources = build_csp_multimedia_source_list() { @@ -115,17 +116,21 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do end connect_src = - if Config.get(:env) == :dev do + if @config_impl.get(:env) == :dev do [connect_src, " http://localhost:3035/"] else connect_src end script_src = - if Config.get(:env) == :dev do - "script-src 'self' 'unsafe-eval'" + if @config_impl.get([:http_security, :allow_unsafe_eval]) do + if @config_impl.get(:env) == :dev do + "script-src 'self' 'unsafe-eval'" + else + "script-src 'self' 'wasm-unsafe-eval'" + end else - "script-src 'self' 'wasm-unsafe-eval'" + "script-src 'self'" end report = if report_uri, do: ["report-uri ", report_uri, ";report-to csp-endpoint"] @@ -161,11 +166,11 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do defp build_csp_multimedia_source_list do media_proxy_whitelist = [:media_proxy, :whitelist] - |> Config.get() + |> @config_impl.get() |> build_csp_from_whitelist([]) - captcha_method = Config.get([Pleroma.Captcha, :method]) - captcha_endpoint = Config.get([captcha_method, :endpoint]) + captcha_method = @config_impl.get([Pleroma.Captcha, :method]) + captcha_endpoint = @config_impl.get([captcha_method, :endpoint]) base_endpoints = [ @@ -173,7 +178,7 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do [Pleroma.Upload, :base_url], [Pleroma.Uploaders.S3, :public_endpoint] ] - |> Enum.map(&Config.get/1) + |> Enum.map(&@config_impl.get/1) [captcha_endpoint | base_endpoints] |> Enum.map(&build_csp_param/1) @@ -200,7 +205,7 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do end def warn_if_disabled do - unless Config.get([:http_security, :enabled]) do + unless Pleroma.Config.get([:http_security, :enabled]) do Logger.warning(" .i;;;;i. iYcviii;vXY: @@ -245,8 +250,8 @@ your instance and your users via malicious posts: end defp maybe_send_sts_header(conn, true) do - max_age_sts = Config.get([:http_security, :sts_max_age]) - max_age_ct = Config.get([:http_security, :ct_max_age]) + max_age_sts = @config_impl.get([:http_security, :sts_max_age]) + max_age_ct = @config_impl.get([:http_security, :ct_max_age]) merge_resp_headers(conn, [ {"strict-transport-security", "max-age=#{max_age_sts}; includeSubDomains"}, diff --git a/test/pleroma/web/plugs/http_security_plug_test.exs b/test/pleroma/web/plugs/http_security_plug_test.exs index c79170382..80ad1fa7d 100644 --- a/test/pleroma/web/plugs/http_security_plug_test.exs +++ b/test/pleroma/web/plugs/http_security_plug_test.exs @@ -3,14 +3,52 @@ # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do - use Pleroma.Web.ConnCase + use Pleroma.Web.ConnCase, async: true alias Plug.Conn - describe "http security enabled" do - setup do: clear_config([:http_security, :enabled], true) + import Mox - test "it sends CSP headers when enabled", %{conn: conn} do + setup do + base_config = Pleroma.Config.get([:http_security]) + %{base_config: base_config} + end + + defp mock_config(config, additional \\ %{}) do + Pleroma.UnstubbedConfigMock + |> stub(:get, fn + [:http_security, key] -> config[key] + key -> additional[key] + end) + end + + describe "http security enabled" do + setup %{base_config: base_config} do + %{base_config: Keyword.put(base_config, :enabled, true)} + end + + test "it does not contain unsafe-eval", %{conn: conn, base_config: base_config} do + mock_config(base_config) + + conn = get(conn, "/api/v1/instance") + [header] = Conn.get_resp_header(conn, "content-security-policy") + refute header =~ ~r/unsafe-eval/ + end + + test "with allow_unsafe_eval set, it does contain it", %{conn: conn, base_config: base_config} do + base_config = + base_config + |> Keyword.put(:allow_unsafe_eval, true) + + mock_config(base_config) + + conn = get(conn, "/api/v1/instance") + [header] = Conn.get_resp_header(conn, "content-security-policy") + assert header =~ ~r/unsafe-eval/ + end + + test "it sends CSP headers when enabled", %{conn: conn, base_config: base_config} do + mock_config(base_config) conn = get(conn, "/api/v1/instance") refute Conn.get_resp_header(conn, "x-xss-protection") == [] @@ -22,8 +60,10 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do refute Conn.get_resp_header(conn, "content-security-policy") == [] end - test "it sends STS headers when enabled", %{conn: conn} do - clear_config([:http_security, :sts], true) + test "it sends STS headers when enabled", %{conn: conn, base_config: base_config} do + base_config + |> Keyword.put(:sts, true) + |> mock_config() conn = get(conn, "/api/v1/instance") @@ -31,8 +71,10 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do refute Conn.get_resp_header(conn, "expect-ct") == [] end - test "it does not send STS headers when disabled", %{conn: conn} do - clear_config([:http_security, :sts], false) + test "it does not send STS headers when disabled", %{conn: conn, base_config: base_config} do + base_config + |> Keyword.put(:sts, false) + |> mock_config() conn = get(conn, "/api/v1/instance") @@ -40,19 +82,30 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do assert Conn.get_resp_header(conn, "expect-ct") == [] end - test "referrer-policy header reflects configured value", %{conn: conn} do - resp = get(conn, "/api/v1/instance") + test "referrer-policy header reflects configured value", %{ + conn: conn, + base_config: base_config + } do + mock_config(base_config) + resp = get(conn, "/api/v1/instance") assert Conn.get_resp_header(resp, "referrer-policy") == ["same-origin"] - clear_config([:http_security, :referrer_policy], "no-referrer") + base_config + |> Keyword.put(:referrer_policy, "no-referrer") + |> mock_config resp = get(conn, "/api/v1/instance") assert Conn.get_resp_header(resp, "referrer-policy") == ["no-referrer"] end - test "it sends `report-to` & `report-uri` CSP response headers", %{conn: conn} do + test "it sends `report-to` & `report-uri` CSP response headers", %{ + conn: conn, + base_config: base_config + } do + mock_config(base_config) + conn = get(conn, "/api/v1/instance") [csp] = Conn.get_resp_header(conn, "content-security-policy") @@ -65,7 +118,11 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do "{\"endpoints\":[{\"url\":\"https://endpoint.com\"}],\"group\":\"csp-endpoint\",\"max-age\":10886400}" end - test "default values for img-src and media-src with disabled media proxy", %{conn: conn} do + test "default values for img-src and media-src with disabled media proxy", %{ + conn: conn, + base_config: base_config + } do + mock_config(base_config) conn = get(conn, "/api/v1/instance") [csp] = Conn.get_resp_header(conn, "content-security-policy") @@ -73,60 +130,129 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do assert csp =~ "img-src 'self' data: blob: https:;" end - test "it sets the Service-Worker-Allowed header", %{conn: conn} do - clear_config([:http_security, :enabled], true) - clear_config([:frontends, :primary], %{"name" => "fedi-fe", "ref" => "develop"}) + test "it sets the Service-Worker-Allowed header", %{conn: conn, base_config: base_config} do + base_config + |> Keyword.put(:enabled, true) - clear_config([:frontends, :available], %{ - "fedi-fe" => %{ - "name" => "fedi-fe", - "custom-http-headers" => [{"service-worker-allowed", "/"}] - } - }) + additional_config = + %{} + |> Map.put([:frontends, :primary], %{"name" => "fedi-fe", "ref" => "develop"}) + |> Map.put( + [:frontends, :available], + %{ + "fedi-fe" => %{ + "name" => "fedi-fe", + "custom-http-headers" => [{"service-worker-allowed", "/"}] + } + } + ) + mock_config(base_config, additional_config) conn = get(conn, "/api/v1/instance") assert Conn.get_resp_header(conn, "service-worker-allowed") == ["/"] end end describe "img-src and media-src" do - setup do - clear_config([:http_security, :enabled], true) - clear_config([:media_proxy, :enabled], true) - clear_config([:media_proxy, :proxy_opts, :redirect_on_failure], false) + setup %{base_config: base_config} do + base_config = + base_config + |> Keyword.put(:enabled, true) + + additional_config = + %{} + |> Map.put([:media_proxy, :enabled], true) + |> Map.put([:media_proxy, :proxy_opts, :redirect_on_failure], false) + |> Map.put([:media_proxy, :whitelist], []) + + %{base_config: base_config, additional_config: additional_config} end - test "media_proxy with base_url", %{conn: conn} do + test "media_proxy with base_url", %{ + conn: conn, + base_config: base_config, + additional_config: additional_config + } do url = "https://example.com" - clear_config([:media_proxy, :base_url], url) + + additional_config = + additional_config + |> Map.put([:media_proxy, :base_url], url) + + mock_config(base_config, additional_config) + assert_media_img_src(conn, url) end - test "upload with base url", %{conn: conn} do + test "upload with base url", %{ + conn: conn, + base_config: base_config, + additional_config: additional_config + } do url = "https://example2.com" - clear_config([Pleroma.Upload, :base_url], url) + + additional_config = + additional_config + |> Map.put([Pleroma.Upload, :base_url], url) + + mock_config(base_config, additional_config) + assert_media_img_src(conn, url) end - test "with S3 public endpoint", %{conn: conn} do + test "with S3 public endpoint", %{ + conn: conn, + base_config: base_config, + additional_config: additional_config + } do url = "https://example3.com" - clear_config([Pleroma.Uploaders.S3, :public_endpoint], url) + + additional_config = + additional_config + |> Map.put([Pleroma.Uploaders.S3, :public_endpoint], url) + + mock_config(base_config, additional_config) assert_media_img_src(conn, url) end - test "with captcha endpoint", %{conn: conn} do - clear_config([Pleroma.Captcha.Mock, :endpoint], "https://captcha.com") + test "with captcha endpoint", %{ + conn: conn, + base_config: base_config, + additional_config: additional_config + } do + additional_config = + additional_config + |> Map.put([Pleroma.Captcha.Mock, :endpoint], "https://captcha.com") + |> Map.put([Pleroma.Captcha, :method], Pleroma.Captcha.Mock) + + mock_config(base_config, additional_config) assert_media_img_src(conn, "https://captcha.com") end - test "with media_proxy whitelist", %{conn: conn} do - clear_config([:media_proxy, :whitelist], ["https://example6.com", "https://example7.com"]) + test "with media_proxy whitelist", %{ + conn: conn, + base_config: base_config, + additional_config: additional_config + } do + additional_config = + additional_config + |> Map.put([:media_proxy, :whitelist], ["https://example6.com", "https://example7.com"]) + + mock_config(base_config, additional_config) assert_media_img_src(conn, "https://example7.com https://example6.com") end # TODO: delete after removing support bare domains for media proxy whitelist - test "with media_proxy bare domains whitelist (deprecated)", %{conn: conn} do - clear_config([:media_proxy, :whitelist], ["example4.com", "example5.com"]) + test "with media_proxy bare domains whitelist (deprecated)", %{ + conn: conn, + base_config: base_config, + additional_config: additional_config + } do + additional_config = + additional_config + |> Map.put([:media_proxy, :whitelist], ["example4.com", "example5.com"]) + + mock_config(base_config, additional_config) assert_media_img_src(conn, "example5.com example4.com") end end @@ -138,8 +264,10 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do assert csp =~ "img-src 'self' data: blob: #{url};" end - test "it does not send CSP headers when disabled", %{conn: conn} do - clear_config([:http_security, :enabled], false) + test "it does not send CSP headers when disabled", %{conn: conn, base_config: base_config} do + base_config + |> Keyword.put(:enabled, false) + |> mock_config conn = get(conn, "/api/v1/instance") From fc7ce339edc40cb791d321a20f01f2568337b845 Mon Sep 17 00:00:00 2001 From: Lain Soykaf Date: Mon, 27 May 2024 21:28:20 +0400 Subject: [PATCH 2/4] Cheatsheet: Add allow_unsafe_eval --- docs/configuration/cheatsheet.md | 1 + 1 file changed, 1 insertion(+) diff --git a/docs/configuration/cheatsheet.md b/docs/configuration/cheatsheet.md index ca2ce6369..78997c4db 100644 --- a/docs/configuration/cheatsheet.md +++ b/docs/configuration/cheatsheet.md @@ -472,6 +472,7 @@ This will make Pleroma listen on `127.0.0.1` port `8080` and generate urls start * ``ct_max_age``: The maximum age for the `Expect-CT` header if sent. * ``referrer_policy``: The referrer policy to use, either `"same-origin"` or `"no-referrer"`. * ``report_uri``: Adds the specified url to `report-uri` and `report-to` group in CSP header. +* `allow_unsafe_eval`: Adds `wasm-unsafe-eval` to the CSP header. Needed for some non-essential frontend features like Flash emulation. ### Pleroma.Web.Plugs.RemoteIp From c67b41415b369d67c25356205bf69de2d99a291c Mon Sep 17 00:00:00 2001 From: Lain Soykaf Date: Sun, 11 Jun 2023 20:24:18 +0400 Subject: [PATCH 3/4] Changelog: Add changelog entry. --- changelog.d/3904.security | 1 + 1 file changed, 1 insertion(+) create mode 100644 changelog.d/3904.security diff --git a/changelog.d/3904.security b/changelog.d/3904.security new file mode 100644 index 000000000..04836d4e8 --- /dev/null +++ b/changelog.d/3904.security @@ -0,0 +1 @@ +HTTP Security: By default, don't allow unsafe-eval. The setting needs to be changed to allow Flash emulation. From 81e44ced0c7251b5a6b585f297e1e00fad08c6d1 Mon Sep 17 00:00:00 2001 From: Lain Soykaf Date: Mon, 27 May 2024 22:13:20 +0400 Subject: [PATCH 4/4] HTTPSecurityPlug: Fix tests --- config/test.exs | 2 +- lib/pleroma/web/plugs/http_security_plug.ex | 4 ++-- test/pleroma/web/plugs/http_security_plug_test.exs | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/config/test.exs b/config/test.exs index b5c9c6e4a..6c88ad3c6 100644 --- a/config/test.exs +++ b/config/test.exs @@ -154,7 +154,7 @@ config :pleroma, Pleroma.Upload, config_impl: Pleroma.UnstubbedConfigMock config :pleroma, Pleroma.ScheduledActivity, config_impl: Pleroma.UnstubbedConfigMock config :pleroma, Pleroma.Web.RichMedia.Helpers, config_impl: Pleroma.StaticStubbedConfigMock config :pleroma, Pleroma.Uploaders.IPFS, config_impl: Pleroma.UnstubbedConfigMock -config :pleroma, Pleroma.Web.Plugs.HTTPSecurityPlug, config_impl: Pleroma.UnstubbedConfigMock +config :pleroma, Pleroma.Web.Plugs.HTTPSecurityPlug, config_impl: Pleroma.StaticStubbedConfigMock peer_module = if String.to_integer(System.otp_release()) >= 25 do diff --git a/lib/pleroma/web/plugs/http_security_plug.ex b/lib/pleroma/web/plugs/http_security_plug.ex index a1dc6c02a..38f6c511e 100644 --- a/lib/pleroma/web/plugs/http_security_plug.ex +++ b/lib/pleroma/web/plugs/http_security_plug.ex @@ -116,7 +116,7 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do end connect_src = - if @config_impl.get(:env) == :dev do + if @config_impl.get([:env]) == :dev do [connect_src, " http://localhost:3035/"] else connect_src @@ -124,7 +124,7 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do script_src = if @config_impl.get([:http_security, :allow_unsafe_eval]) do - if @config_impl.get(:env) == :dev do + if @config_impl.get([:env]) == :dev do "script-src 'self' 'unsafe-eval'" else "script-src 'self' 'wasm-unsafe-eval'" diff --git a/test/pleroma/web/plugs/http_security_plug_test.exs b/test/pleroma/web/plugs/http_security_plug_test.exs index 80ad1fa7d..11a351a41 100644 --- a/test/pleroma/web/plugs/http_security_plug_test.exs +++ b/test/pleroma/web/plugs/http_security_plug_test.exs @@ -15,7 +15,7 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do end defp mock_config(config, additional \\ %{}) do - Pleroma.UnstubbedConfigMock + Pleroma.StaticStubbedConfigMock |> stub(:get, fn [:http_security, key] -> config[key] key -> additional[key]