Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks. In operation since before 1985, NTP is one of the oldest Internet protocols in current use. NTP’s has a native application implementation, ntpq, which can be accessed from command line.
A stack overflow vulnerability is reported in ntpq. Because the request parse function decodearr() failed to validate the size of request parameters, an attacker could overwrite the stack content with controllable content. A successful attack could lead to an arbitrary code execution on the target server with the privilege of the service application.