In LibTIFF 4.0.8, there is a denial of service vulnerability in the TIFFOpen function. A crafted input will lead to a denial of service attack. During the TIFFOpen process, tdimagelength is not checked. The value of tdimagelength can be directly controlled by an input file. In the ChopUpSingleUncompressedStrip function, the TIFFCheckMalloc function is called based on tdimagelength. If we set the value of td_imagelength close to the amount of system memory, it will hang the system or trigger the OOM killer.