18%
32%
48%
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x 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.
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x 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.
CVSS 2.0 Base Score 1.8. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: high. CVSS Vector: (AV:A/AC:H/Au:N/C:N/I:P/A:N).
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