Updated gnuchess packages fix security vulnerability

Updated gnuchess package fixes security vulnerability: A vulnerability was found in GNU Chess 6.2.5, there is a stack-based buffer overflow in the cmdload function in frontend/cmd.cc via a crafted chess position in an EPD file CVE-2019-15767...

Updated gnuchess packages fix security vulnerability

gnuchess before 6.2.4 is vulnerable to a stack buffer overflow related to user move input, where 160 characters of input can crash gnuchess CVE-2015-8972...