Mandriva Linux Security Advisory : ntp (MDVSA-2015:202)
Medium Nessus Plugin ID 82737
Synopsis
The remote Mandriva Linux host is missing one or more security updates.
Description
Multiple vulnerabilities has been found and corrected in ntp :
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC (CVE-2015-1798).
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer (CVE-2015-1799).
The updated packages provides a solution for these security issues.
Solution
Update the affected ntp, ntp-client and / or ntp-doc packages.