references/openproject
1
0
Fork 0
mirror of https://github.com/opf/openproject.git synced 2026-06-13 19:20:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

add a imagemagick policy.xml file to be used with mini_magick gem

Browse Source
This commit is contained in:
as-op
2026-01-08 13:36:16 +01:00
parent 05bff78a1a
commit 336d40650b
2 changed files with 80 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/imagemagick/policy.xml
+67
View File
@@ -0,0 +1,67 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE policymap [
<!ELEMENT policymap (policy)*>
<!ATTLIST policymap xmlns CDATA #FIXED "">
<!ELEMENT policy EMPTY>
<!ATTLIST policy xmlns CDATA #FIXED "">
<!ATTLIST policy domain NMTOKEN #REQUIRED>
<!ATTLIST policy name NMTOKEN #IMPLIED>
<!ATTLIST policy pattern CDATA #IMPLIED>
<!ATTLIST policy rights NMTOKEN #IMPLIED>
<!ATTLIST policy stealth NMTOKEN #IMPLIED>
<!ATTLIST policy value CDATA #IMPLIED>
]>
<!--
Creating a security policy that fits your specific local environment
before making use of ImageMagick is highly advised. You can find guidance on
setting up this policy at https://imagemagick.org/script/security-policy.php,
and it's important to verify your policy using the validation tool located
at https://imagemagick-secevaluator.doyensec.com/.
Web-safe ImageMagick security policy:
This security protocol designed for web-safe usage focuses on situations
where ImageMagick is applied in publicly accessible contexts, like websites.
It deactivates the capability to read from or write to any image formats
other than web-safe formats like GIF, JPEG, and PNG. Additionally, this
policy prohibits the execution of image filters and indirect reads, thereby
thwarting potential security breaches. By implementing these limitations,
the web-safe policy fortifies the safeguarding of systems accessible to
the public, reducing the risk of exploiting ImageMagick's capabilities
for potential attacks.
-->
<policymap>
<!-- Dynamically yield the CPU relative to the system load average. -->
<policy domain="resource" name="dynamic-throttle" value="false"/>
<!-- Force memory initialization by memory mapping select memory allocations. -->
<policy domain="cache" name="memory-map" value="anonymous"/>
<!-- Ensure all image data is fully flushed and synchronized to disk. -->
<policy domain="cache" name="synchronize" value="true"/>
<!-- Do not permit any delegates to execute. -->
<policy domain="delegate" rights="none" pattern="*"/>
<!-- Do not permit any image filters to load. -->
<policy domain="filter" rights="none" pattern="*"/>
<!-- Don't read/write from/to stdin/stdout. -->
<policy domain="path" rights="none" pattern="-"/>
<!-- don't read sensitive paths. -->
<policy domain="path" rights="none" pattern="/etc/*"/>
<!-- Indirect reads are not permitted. -->
<policy domain="path" rights="none" pattern="@*"/>
<!-- Deny all image modules and specifically exempt reading or writing web-safe image formats. -->
<policy domain="module" rights="none" pattern="*" />
<!-- Allow only web-safe image formats. -->
<policy domain="module" rights="read | write" pattern="{GIF,JPEG,PNG,WEBP}" />
<!-- Disable PDF -->
<policy domain="coder" rights="none" pattern="PDF" />
<!-- CVE-2016–3714 https://imagetragick.com/ -->
<policy domain="coder" rights="none" pattern="EPHEMERAL" />
<policy domain="coder" rights="none" pattern="URL" />
<policy domain="coder" rights="none" pattern="HTTPS" />
<policy domain="coder" rights="none" pattern="MVG" />
<policy domain="coder" rights="none" pattern="MSL" />
<policy domain="coder" rights="none" pattern="TEXT" />
<policy domain="coder" rights="none" pattern="SHOW" />
<policy domain="coder" rights="none" pattern="WIN" />
<policy domain="coder" rights="none" pattern="PLT" />
</policymap>
config/initializers/mini_magick.rb
+13
View File
@@ -0,0 +1,13 @@
require "mini_magick"
# Ensure ImageMagick reads the project-local policy.xml (websafe)
# ENV["MAGICK_CONFIGURE_PATH"] ||= Rails.root.join("config/imagemagick").to_s
MiniMagick.configure do |config|
# configure MiniMagick CLI to use ImageMagick (not GraphicsMagick)
config.graphicsmagick = false
# also set the MAGICK_CONFIGURE_PATH for the CLI commands
config.cli_env = {
"MAGICK_CONFIGURE_PATH" => Rails.root.join("config/imagemagick").to_s
}
end