VULNERABILITY INTELLIGENCE

CVE-2015-1853

CVSS score6.5 MEDIUM
EPSS probability1.70%
CISA KEVNot currently listed
Published2019-12-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.

Primary references