Comodo - Integer Overlow Leading to Heap Overflow Parsing Composite Documents

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=762 In COleMemFile::LoadDiFatList, values from the header are used to parse the document FAT. If header.csectDif is very high, the calculation overflows and a very small buffer is allocated. The document FAT is then memcpy'd onto t...