Release Notes: Clock accuracy with NTP sources and reference clocks was improved. Source selection and polling interval adjustment were improved. Delayed server name resolving was added. Many other bug fixes and improvements were made.
Release Notes: The chrony control protocol was modified to prevent amplification attacks (CVE-2014-0021).
Release Notes: Two security vulnerabilities were fixed: a crash when processing crafted commands (CVE-2012-4502) and uninitialized data sent in command replies (CVE-2012-4503).
Release Notes: Combining of measurements from multiple sources was implemented, an option to generate command keys was added, an option to authenticate chronyc automatically was added, compatibility with NTPv1 and NTPv2 clients was improved, and other improvements and bugfixes were made.
Release Notes: Support for stronger authentication via NSS or libtomcrypt has been added, reports printed by chronyc have been extended, and other improvements and bugfixes have been made.
Release Notes: Compatibility with Linux kernel 3.0 was added, replying on multi-homed IPv6 hosts was fixed, and other minor bugfixes and improvements were made.