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This my port rlottie 0.2 for Android. Based of telegram version
https://drive.google.com/file/d/1eKRWkfxtUr-7IK2WuyGpv_CqMtmcyE0E/view?usp=sharing
Telegram-iOS project updated its dependency of rlottie
to a commit that's not pushed here. Could you add it?
TelegramMessenger/Telegram-iOS@1aa3a8b#diff-2b1721a181aa09926d019f44b5e9c229
Hello,
There is a signed integer overflow within the library, within the following tags can trigger this resulting in denial of service within rlottie.
./harness small.json frame count: 1 starting... /home/harry/rlottie/src/vector/freetype/v_ft_raster.cpp:1385:38: runtime error: signed integer overflow: -2147483648 - 2147483647 cannot be represented in type 'int'
This can be found here when loading in the Json file:
{ "v": "0", "": [], "assets": [ { "": 0 }, { "": 0, "id": "fr000", "h": 2 }, { "": 0 } ], "layers": [ { "": 0 }, { "": 0 }, { "": 0, "ks": { "": { "": 0 } }, "ty": 2, "refId": "fr000" } ] }
The overflow occurs when the parameters of refId are given 000 resulting in a overflow. This has to be within the layers function for the bug to be triggered:
rlottie/src/vector/freetype/v_ft_raster.cpp
Line 1434 in 67f103b
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