Out of bounds Copy in Libjxl in large image groups

For certain valid JPEG XL images with a size slightly larger than an integer number of groups (256x256 pixels) when processing the groups out of order the decoder can perform an out of bounds copy of image pixels from an image buffer in the heap to another. This copy can occur when processing the right or bottom edges of the image, but only when groups are processed in certain order. Groups can be processed out of order in multi-threaded decoding environments with heavy thread load but also with images that contain the groups in an arbitrary order in the file. It is recommended to upgrade past 0.6.0 or patch with https://github.com/libjxl/libjxl/pull/775

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

堆缓冲区溢出

Github libjxl 缓冲区错误漏洞

Github libjxl是一个PEG XL（编码器和解码器）的参考实现。 libjxl存在安全漏洞，该漏洞源于当渲染样条时，使用libjxl的无效JPEG XL图像可能会导致对std::vector<std::vector<T>>的越界访问。OOB读访问可能导致段错误，或者基于其他进程内存渲染样条。

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