Design/Logic Flaw

A vulnerability exists in the Windows sandbox where an uninitialized value in memory can be leaked to a renderer from a broker when making a call to access an otherwise unavailable file. This results in the potential leaking of information stored at that memory location. Note: this issue only occurs on Windows. Other operating systems are unaffected.. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.