CVEvulnerability

CVE-2016-1548

7.2 HIGH Published 2017-01-06 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2017-01-06
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
7.2 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
CVSS 2.0 ([email protected])
6.4 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:P
Weaknesses
CWE-19

Description

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.

Affected configurations

• ntp ntp 4.2.8

Related

Weakness · not in database (1)

References