NTP 4.2.8 Patch 3-Release Candidate 1

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.

Published: 2020-06-04T12:31:55.000Z
Updated: 2025-05-05T17:07:58.872Z

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.

Published: 2020-04-17T03:31:05.000Z
Updated: 2025-05-05T17:08:18.997Z

NTP through 4.2.8p12 has a NULL Pointer Dereference.

Published: 2019-05-15T15:37:31.000Z
Updated: 2024-08-04T21:31:37.562Z

The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the "other side" of an interleaved association causing the victim ntpd to reset its association.

Published: 2018-03-06T20:00:00.000Z
Updated: 2024-08-05T06:24:11.467Z

ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim's clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549.

Published: 2018-03-06T20:00:00.000Z
Updated: 2024-08-05T06:24:10.327Z