The Network Time Protocol is used to synchronize a computer"s time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. Security Fix: * It was found that the fix for CVE-2014-9750 was incomplete: three issues were found in the value length checks in NTP"s ntp_crypto.c, where a packet with particular autokey operations that contained malicious data was not always being completely validated. A remote attacker could use a specially crafted NTP packet to crash ntpd. * A memory leak flaw was found in ntpd"s CRYPTO_ASSOC. If ntpd was configured to use autokey authentication, an attacker could send packets to ntpd that would, after several days of ongoing attack, cause it to run out of memory. * An off-by-one flaw, leading to a buffer overflow, was found in cookedprint functionality of ntpq. A specially crafted NTP packet could potentially cause ntpq to crash. * A NULL pointer dereference flaw was found in the way ntpd processed "ntpdc reslist" commands that queried restriction lists with a large amount of entries. A remote attacker could potentially use this flaw to crash ntpd. * A stack-based buffer overflow flaw was found in the way ntpd processed "ntpdc reslist" commands that queried restriction lists with a large amount of entries. A remote attacker could use this flaw to crash ntpd. * It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands. * It was found that ntpd would exit with a segmentation fault when a statistics type that was not enabled during compilation was referenced by the statistics or filegen configuration command. * It was discovered that the sntp utility could become unresponsive due to being caught in an infinite loop when processing a crafted NTP packet. * It was found that NTP"s :config command could be used to set the pidfile and driftfile paths without any restrictions. A remote attacker could use this flaw to overwrite a file on the file system with a file containing the pid of the ntpd process or the current estimated drift of the system clock . The CVE-2015-5219 and CVE-2015-7703 issues were discovered by Miroslav Lichvar . For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.8 Release Notes and Red Hat Enterprise Linux 6.8 Technical Notes linked from the References section.