Vulnerability Database

308,820

Total vulnerabilities in the database

CVE-2015-1853

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.

  • Published: Dec 9, 2019
  • Updated: Nov 9, 2025
  • CVE: CVE-2015-1853
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 4
  • AV:N/AC:L/Au:S/C:N/I:N/A:P

No CWE or OWASP classifications available.

Software From Fixed in
tuxfamily / chrony - 1.31.1