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fix(preview): check mime type before processing with Imagick#44710

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pulsejet/imagick-check-type
May 15, 2024
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fix(preview): check mime type before processing with Imagick#44710
nickvergessen merged 1 commit intomasterfrom
pulsejet/imagick-check-type

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@pulsejet pulsejet commented Apr 8, 2024 •
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@pulsejet pulsejet added 3. to review Waiting for reviews security php Pull requests that update Php code labels Apr 8, 2024
@pulsejet pulsejet added this to the Nextcloud 30 milestone Apr 8, 2024
@pulsejet pulsejet requested review from a team, come-nc, nickvergessen and skjnldsv April 8, 2024 02:37
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@pulsejet pulsejet force-pushed the pulsejet/imagick-check-type branch from fb5711d to ffe31a5 Compare April 8, 2024 03:18
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@pulsejet pulsejet force-pushed the pulsejet/imagick-check-type branch from ffe31a5 to 0e612ae Compare April 8, 2024 07:55
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pulsejet commented Apr 8, 2024

I made one change: the default behavior of the Bitmap class is now to match nothing rather than everything. As a result, any derived classes will not match anything unless getAllowedMimeTypes is defined (the breaking change is intentional). Let me know if this isn't desirable for any strong reason.

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@pulsejet pulsejet force-pushed the pulsejet/imagick-check-type branch 2 times, most recently from c46ecd6 to 31fc099 Compare April 8, 2024 08:30
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@pulsejet pulsejet force-pushed the pulsejet/imagick-check-type branch from 31fc099 to 5d4d84b Compare April 8, 2024 09:17
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fix(preview): check mime type before processing with Imagick
4ab40e3 
Signed-off-by: Varun Patil <varunpatil@ucla.edu>
@pulsejet pulsejet force-pushed the pulsejet/imagick-check-type branch from 5d4d84b to 4ab40e3 Compare April 8, 2024 17:22
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pulsejet commented Apr 19, 2024

Bump

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pulsejet commented Apr 25, 2024

Bump (2)

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nickvergessen commented Apr 25, 2024

yeah, there was a freeze recently for updates, so this could not proceed with all necessary energy

Altahrim
Altahrim reviewed Apr 25, 2024
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@nickvergessen nickvergessen self-assigned this May 2, 2024
@nickvergessen nickvergessen merged commit bd6989d into master May 15, 2024
@nickvergessen nickvergessen deleted the pulsejet/imagick-check-type branch May 15, 2024 20:13
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nickvergessen commented May 15, 2024

/backport to stable29

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nickvergessen commented May 15, 2024

/backport to stable28

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nickvergessen commented May 15, 2024

/backport to stable27

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vermeeren commented Nov 1, 2024

Hi @nickvergessen,

Recently I'm starting to use the HEIC format and saw the image previews are not working by default. I did some searching and found a nasty CVE from 2021 https://hackerone.com/reports/1261413 which was fixed by disabling the HEIC preview in #28077. With this change and checking the mime type it does seem safe to me to enable HEIC, but I do notice the default is still to keep it disabled.

Could you confirm whether it is considered secure to enable HEIC previews in the latest Nextcloud versions? I would love to have previews but of course not at the cost of a potentially critical security issue.

Many thanks!

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nickvergessen commented Nov 6, 2024

Could you confirm whether it is considered secure to enable HEIC previews in the latest Nextcloud versions? I would love to have previews but of course not at the cost of a potentially critical security issue.

I'm not too much into previews and Imagick/HEIC things, sorry.

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