Null source pointer passed as an argument to memcpy() function within TIFFFetchStripThing() in tif_dirread.c in libtiff versions from 3.9.0 to 4.3.0 could lead to Denial of Service via crafted TIFF file. For users that compile libtiff from sources, the fix is available with commit eecb0712. A flaw was found in libtiff where a NULL source pointer passed as an argument to the memcpy() function within the TIFFFetchStripThing() in tif_dirread.c. This flaw allows an attacker with a crafted TIFF file to exploit this flaw, causing a crash and leading to a denial of service.
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