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Merge branch 'explicitly-allow-unsafe-2' into 'develop'

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Explicitly allow unsafe 2

See merge request pleroma/pleroma!4125
This commit is contained in:
lain 2024-05-27 18:43:05 +00:00
commit 121791882f
7 changed files with 206 additions and 64 deletions
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1
changelog.d/3904.security Normal file
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@ -0,0 +1 @@
HTTP Security: By default, don't allow unsafe-eval. The setting needs to be changed to allow Flash emulation.

3
config/config.exs
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@ -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,

1
config/test.exs
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@ -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.StaticStubbedConfigMock
peer_module =
if String.to_integer(System.otp_release()) >= 25 do

1
docs/configuration/cheatsheet.md
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@ -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

7
lib/pleroma/application.ex
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@ -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()

49
lib/pleroma/web/plugs/http_security_plug.ex
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@ -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"},

208
test/pleroma/web/plugs/http_security_plug_test.exs
View file

@ -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.StaticStubbedConfigMock
|> 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")