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Add security headers to synapse-admin (on Traefik)

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We've had it on `matrix-nginx-proxy` before, but
our initial support for Traefik did not include any of these security
headers.
This commit is contained in:
Slavi Pantaleev 2023-02-14 08:49:00 +02:00
parent 71597132e0
commit c33ed94352
2 changed files with 76 additions and 3 deletions
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72
roles/custom/matrix-synapse-admin/defaults/main.yml
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@ -27,6 +27,11 @@ matrix_synapse_admin_container_network: matrix-synapse-admin
# Use this to expose this container to a reverse proxy, which runs in a different container network.
matrix_synapse_admin_container_additional_networks: []
# Controls whether the matrix-synapse-admin container exposes its HTTP port (tcp/80 in the container).
#
# Takes an "<ip>:<port>" or "<port>" value (e.g. "127.0.0.1:8766"), or empty string to not expose.
matrix_synapse_admin_container_http_host_bind_port: ''
# A list of extra arguments to pass to the container
matrix_synapse_admin_container_extra_arguments: []
@ -44,6 +49,21 @@ matrix_synapse_admin_container_labels_traefik_entrypoints: web-secure
matrix_synapse_admin_container_labels_traefik_tls: "{{ matrix_synapse_admin_container_labels_traefik_entrypoints != 'web' }}"
matrix_synapse_admin_container_labels_traefik_tls_certResolver: default # noqa var-naming
# Controls which additional headers to attach to all HTTP responses.
# To add your own headers, use `matrix_synapse_admin_container_labels_traefik_additional_response_headers_custom`
matrix_synapse_admin_container_labels_traefik_additional_response_headers: "{{ matrix_synapse_admin_container_labels_traefik_additional_response_headers_auto | combine(matrix_synapse_admin_container_labels_traefik_additional_response_headers_custom) }}"
matrix_synapse_admin_container_labels_traefik_additional_response_headers_auto: |
{{
{}
| combine ({'X-XSS-Protection': matrix_synapse_admin_http_header_xss_protection} if matrix_synapse_admin_http_header_xss_protection else {})
| combine ({'X-Frame-Options': matrix_synapse_admin_http_header_frame_options} if matrix_synapse_admin_http_header_frame_options else {})
| combine ({'X-Content-Type-Options': matrix_synapse_admin_http_header_content_type_options} if matrix_synapse_admin_http_header_content_type_options else {})
| combine ({'Content-Security-Policy': matrix_synapse_admin_http_header_content_security_policy} if matrix_synapse_admin_http_header_content_security_policy else {})
| combine ({'Permission-Policy': matrix_synapse_admin_http_header_content_permission_policy} if matrix_synapse_admin_http_header_content_permission_policy else {})
| combine ({'Strict-Transport-Security': matrix_synapse_admin_http_header_strict_transport_security} if matrix_synapse_admin_http_header_strict_transport_security and matrix_synapse_admin_container_labels_traefik_tls else {})
}}
matrix_synapse_admin_container_labels_traefik_additional_response_headers_custom: {}
# matrix_synapse_admin_container_labels_additional_labels contains a multiline string with additional labels to add to the container label file.
# See `../templates/labels.j2` for details.
#
@ -59,10 +79,56 @@ matrix_synapse_admin_systemd_required_services_list: ['docker.service']
# List of systemd services that matrix-synapse-admin.service wants
matrix_synapse_admin_systemd_wanted_services_list: []
# Controls whether the matrix-synapse-admin container exposes its HTTP port (tcp/80 in the container).
# Specifies the value of the `X-XSS-Protection` header
# Stops pages from loading when they detect reflected cross-site scripting (XSS) attacks.
#
# Takes an "<ip>:<port>" or "<port>" value (e.g. "127.0.0.1:8766"), or empty string to not expose.
matrix_synapse_admin_container_http_host_bind_port: ''
# Learn more about it is here:
# - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection
# - https://portswigger.net/web-security/cross-site-scripting/reflected
matrix_synapse_admin_http_header_xss_protection: "1; mode=block"
# Specifies the value of the `X-Frame-Options` header which controls whether framing can happen.
# See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
matrix_synapse_admin_http_header_frame_options: SAMEORIGIN
# Specifies the value of the `X-Content-Type-Options` header.
# See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
matrix_synapse_admin_http_header_content_type_options: nosniff
# Specifies the value of the `Content-Security-Policy` header.
# See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
matrix_synapse_admin_http_header_content_security_policy: frame-ancestors 'self'
# Specifies the value of the `Permission-Policy` header.
# See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Permission-Policy
matrix_synapse_admin_http_header_content_permission_policy: "{{ 'interest-cohort=() always' if matrix_synapse_admin_floc_optout_enabled else '' }}"
# Specifies the value of the `Strict-Transport-Security` header.
# See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security
matrix_synapse_admin_http_header_strict_transport_security: "{{ '\"max-age=31536000; includeSubDomains; preload\" always' if matrix_synapse_admin_hsts_preload_enabled else '\"max-age=31536000; includeSubDomains\" always' }}"
# Controls whether to send a "Permissions-Policy interest-cohort=();" header along with all responses
#
# Learn more about what it is here:
# - https://www.eff.org/deeplinks/2021/03/googles-floc-terrible-idea
# - https://paramdeo.com/blog/opting-your-website-out-of-googles-floc-network
# - https://amifloced.org/
#
# Of course, a better solution is to just stop using browsers (like Chrome), which participate in such tracking practices.
# See: `matrix_synapse_admin_content_permission_policy`
matrix_synapse_admin_floc_optout_enabled: true
# Controls if HSTS preloading is enabled
#
# In its strongest and recommended form, the [HSTS policy](https://www.chromium.org/hsts) includes all subdomains, and
# indicates a willingness to be "preloaded" into browsers:
# `Strict-Transport-Security: max-age=31536000; includeSubDomains; preload`
# For more information visit:
# - https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security
# - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security
# - https://hstspreload.org/#opt-in
# See: `matrix_synapse_admin_http_header_strict_transport_security`
matrix_synapse_admin_hsts_preload_enabled: false
# The path at which Synapse Admin will be exposed on `matrix.DOMAIN`
# (only applies when matrix-nginx-proxy is used).

7
roles/custom/matrix-synapse-admin/templates/labels.j2
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@ -18,6 +18,13 @@ traefik.http.middlewares.matrix-synapse-admin-strip-prefix.stripprefix.prefixes=
{% set middlewares = middlewares + ['matrix-synapse-admin-strip-prefix'] %}
{% endif %}
{% if matrix_synapse_admin_container_labels_traefik_additional_response_headers.keys() | length > 0 %}
{% for name, value in matrix_synapse_admin_container_labels_traefik_additional_response_headers.items() %}
traefik.http.middlewares.matrix-synapse-admin-add-headers.headers.customresponseheaders.{{ name }}={{ value }}
{% endfor %}
{% set middlewares = middlewares + ['matrix-synapse-admin-add-headers'] %}
{% endif %}
traefik.http.routers.matrix-synapse-admin.rule={{ matrix_synapse_admin_container_labels_traefik_rule }}
{% if middlewares | length > 0 %}
traefik.http.routers.matrix-synapse-admin.middlewares={{ middlewares | join(',') }}