0aa0b71f2c
* Fix attachments getting processed despite failing content-type validation * Add a restrictive ImageMagick security policy tailored for Mastodon * Fix misdetection of MP3 files with large cover art * Reject unprocessable audio/video files instead of keeping them unchanged
28 lines
1.0 KiB
XML
28 lines
1.0 KiB
XML
<policymap>
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<!-- Set some basic system resource limits -->
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<policy domain="resource" name="time" value="60" />
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<policy domain="module" rights="none" pattern="URL" />
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<policy domain="filter" rights="none" pattern="*" />
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<!--
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Ideally, we would restrict ImageMagick to only accessing its own
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disk-backed pixel cache as well as Mastodon-created Tempfiles.
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However, those paths depend on the operating system and environment
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variables, so they can only be known at runtime.
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Furthermore, those paths are not necessarily shared across Mastodon
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processes, so even creating a policy.xml at runtime is impractical.
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For the time being, only disable indirect reads.
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-->
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<policy domain="path" rights="none" pattern="@*" />
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<!-- Disallow any coder by default, and only enable ones required by Mastodon -->
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<policy domain="coder" rights="none" pattern="*" />
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<policy domain="coder" rights="read | write" pattern="{PNG,JPEG,GIF,HEIC,WEBP}" />
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<policy domain="coder" rights="write" pattern="{HISTOGRAM,RGB,INFO}" />
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</policymap>
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