CVE-2016-1549

MEDIUM

NTP 4.2.8p4 & earlier - Privilege Escalation

Title source: llm

Description

A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.

References (9)

[Vendor Advisory] http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1035705

[Mitigation, Technical Description, Third Party Advisory] http://www.talosintelligence.com/reports/TALOS-2016-0083/

[Various Sources] https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc

[Vendor Advisory] https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us

[Various Sources] https://www.synology.com/support/security/Synology_SA_18_13

[Vendor Advisory] https://security.netapp.com/advisory/ntap-20171004-0002/

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/88200

[Third Party Advisory] https://security.gentoo.org/glsa/201607-15

Scores

CVSS v3 6.5

EPSS 0.0097

EPSS Percentile 76.4%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Classification

CWE

CWE-19

Status published

Affected Products (5)

ntp/ntp

NTP Project/NTP < 4.2.8p3

NTP Project/NTP < 4.2.8p4

NTPsec Project/NTPSec < 3e160db8dc248a0bcb053b56a80167dc742d2b74

NTPsec Project/NTPSec < a5fb34b9cc89b92a8fef2f459004865c93bb7f92

Timeline

Published Jan 06, 2017

Tracked Since Feb 18, 2026