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Heap over-read in PHP EXIF extension

Disclosure Date: April 18, 2019 (last updated November 27, 2024)
When processing certain files, PHP EXIF extension in versions 7.1.x below 7.1.28, 7.2.x below 7.2.17 and 7.3.x below 7.3.4 can be caused to read past allocated buffer in exif_process_IFD_TAG function. This may lead to information disclosure or crash.