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Drop X-Download-Options 

It's an IE8-era header where Adobe products used to use the IE engine
when making outbound web requests to embed webpages such as
Adobe Acrobat. This is something that a secure and modern CSP would
protect against.

Signed-off-by: r3g_5z <june@terezi.dev>
This commit is contained in:
r3g_5z 2022-11-19 23:12:02 -05:00
parent 6453297e9c
commit 413b40b510
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6 changed files with 0 additions and 7 deletions
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1
docs/docs/configuration/hardening.md
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@ -27,7 +27,6 @@ This will send additional HTTP security headers to the clients, including:
* `X-Permitted-Cross-Domain-Policies: "none"`
* `X-Frame-Options: "DENY"`
* `X-Content-Type-Options: "nosniff"`
* `X-Download-Options: "noopen"`
A content security policy (CSP) will also be set:

1
docs/docs/configuration/i2p.md
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@ -160,7 +160,6 @@ server {
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
add_header Referrer-Policy same-origin;
add_header X-Download-Options noopen;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;

1
docs/docs/configuration/onion_federation.md
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@ -104,7 +104,6 @@ server {
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
add_header Referrer-Policy same-origin;
add_header X-Download-Options noopen;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;

1
docs/docs/installation/openbsd_en.md
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@ -165,7 +165,6 @@ http protocol plerup { # Protocol for upstream akkoma server
match response header append "X-Frame-Options" value "DENY"
match response header append "X-Content-Type-Options" value "nosniff"
match response header append "Referrer-Policy" value "same-origin"
match response header append "X-Download-Options" value "noopen"
match response header append "Content-Security-Policy" value "default-src 'none'; base-uri 'self'; form-action 'self'; img-src 'self' data: https:; media-src 'self' https:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self'; connect-src 'self' wss://CHANGEME.tld; upgrade-insecure-requests;" # Modify "CHANGEME.tld" and set your instance's domain here
match request header append "Connection" value "upgrade"
#match response header append "Strict-Transport-Security" value "max-age=31536000; includeSubDomains" # Uncomment this only after you get HTTPS working.

1
lib/pleroma/web/plugs/http_security_plug.ex
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@ -47,7 +47,6 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlug do
{"x-frame-options", "DENY"},
{"x-content-type-options", "nosniff"},
{"referrer-policy", referrer_policy},
{"x-download-options", "noopen"},
{"content-security-policy", csp_string()},
{"permissions-policy", "interest-cohort=()"}
]

2
test/pleroma/web/plugs/http_security_plug_test.exs
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@ -17,7 +17,6 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do
refute Conn.get_resp_header(conn, "x-permitted-cross-domain-policies") == []
refute Conn.get_resp_header(conn, "x-frame-options") == []
refute Conn.get_resp_header(conn, "x-content-type-options") == []
refute Conn.get_resp_header(conn, "x-download-options") == []
refute Conn.get_resp_header(conn, "referrer-policy") == []
refute Conn.get_resp_header(conn, "content-security-policy") == []
end
@ -155,7 +154,6 @@ defmodule Pleroma.Web.Plugs.HTTPSecurityPlugTest do
assert Conn.get_resp_header(conn, "x-permitted-cross-domain-policies") == []
assert Conn.get_resp_header(conn, "x-frame-options") == []
assert Conn.get_resp_header(conn, "x-content-type-options") == []
assert Conn.get_resp_header(conn, "x-download-options") == []
assert Conn.get_resp_header(conn, "referrer-policy") == []
assert Conn.get_resp_header(conn, "content-security-policy") == []
end