NTP is a protocol designed to synchronize the clocks of computers over a network. The net-misc/ntp package contains the official reference implementation by the NTP Project.
Multiple vulnerabilities have been discovered in NTP. Please review the CVE identifiers referenced below for details.
A remote unauthenticated attacker may be able to execute arbitrary code with the privileges of the process, cause a Denial of Service condition, and obtain sensitive information that could assist in other attacks.
There is no known workaround at this time.
All NTP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.8"