| Description: | Summary:
The remote host is missing an update for the 'ntp' package(s) announced via the ALAS-2016-727 advisory.
Vulnerability Insight:
It was discovered that ntpq and ntpdc disclosed the origin timestamp to unauthenticated clients, which could permit such clients to forge the server's replies. (CVE-2015-8139)
The process_packet function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (peer-variable modification) by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication. (CVE-2016-4954)
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time. (CVE-2016-4955)
ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (interleaved-mode transition and time change) via a spoofed broadcast packet. This vulnerability exists because of an incomplete fix for CVE-2016-1548. (CVE-2016-4956)
Affected Software/OS:
'ntp' package(s) on Amazon Linux.
Solution:
Please install the updated package(s).
CVSS Score:
5.0
CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
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