freeipmi: FreeIPMI: stack-based buffer overflow in ipmi-oem Dell system info handler

A stack-based buffer overflow exists in FreeIPMI's ipmi-oem tool, in the Dell OEM handler for the get-system-info cmc-ipv6-info subcommand. The vulnerable function outputdellsysteminfocmcipv6info uses a 256-byte stack buffer but allows up to 65536 bytes of data to be copied from a BMC response...