The Network Time Protocol (NTP) is used to synchronize a computer's timewith a referenced time source.A buffer overflow flaw was discovered in the ntpd daemon's NTPv4authentication code. If ntpd was configured to use public key cryptographyfor NTP packet authentication, a remote attacker could use this flaw tosend a specially-crafted request packet that could crash ntpd or,potentially, execute arbitrary code with the privileges of the "ntp" user.(CVE-2009-1252)Note: NTP authentication is not enabled by default.A buffer overflow flaw was found in the ntpq diagnostic command. Amalicious, remote server could send a specially-crafted reply to an ntpqrequest that could crash ntpq or, potentially, execute arbitrary code withthe privileges of the user running the ntpq command. (CVE-2009-0159)All ntp users are advised to upgrade to this updated package, whichcontains backported patches to resolve these issues. After installing theupdate, the ntpd daemon will be restarted automatically.