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[stable18] Fix security header setting in .htaccess by adding 'onsuccess unset' #20647

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Apr 29, 2020
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[stable18] Fix security header setting in .htaccess by adding 'onsuccess unset' #20647

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17 changes: 17 additions & 0 deletions .htaccess
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Original file line number Diff line number Diff line change
Expand Up @@ -11,13 +11,30 @@

<IfModule mod_env.c>
# Add security and privacy related headers

# Avoid doubled headers by unsetting headers in "onsuccess" table,
# then add headers to "always" table: https://github.com/nextcloud/server/pull/19002
Header onsuccess unset Referrer-Policy
Header always set Referrer-Policy "no-referrer"

Header onsuccess unset X-Content-Type-Options
Header always set X-Content-Type-Options "nosniff"

Header onsuccess unset X-Download-Options
Header always set X-Download-Options "noopen"

Header onsuccess unset X-Frame-Options
Header always set X-Frame-Options "SAMEORIGIN"

Header onsuccess unset X-Permitted-Cross-Domain-Policies
Header always set X-Permitted-Cross-Domain-Policies "none"

Header onsuccess unset X-Robots-Tag
Header always set X-Robots-Tag "none"

Header onsuccess unset X-XSS-Protection
Header always set X-XSS-Protection "1; mode=block"

SetEnv modHeadersAvailable true
</IfModule>

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