cpython: python: Python zipfile End of Central Directory (EOCD) Locator record offset not checked

A zip file handling flaw has been discovered in the python standard library zipfile module. The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory EOCD Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record wou...