vulnwire
3.7low

CVE-2016-1551

ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from reques…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
3.7
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
2.2%
percentile 83%
Public exploits
0
none known

ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.

Exploit prediction (EPSS)

2.23% probability of exploitation in the next 30 days, higher than 83% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.03.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD2.02.6AV:N/AC:H/Au:N/C:N/I:P/A:N

Affected products

  • NTP Project NTP
  • NTPsec Project NTPSec

Classification

Weakness

References

  • securityfocus.com /bid/88219 · vdb-entry, x_refsource_BID, x_transferred
  • talosintelligence.com /reports/TALOS-2016-0132/ · x_refsource_MISC, x_transferred
  • securitytracker.com /id/1035705 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • oracle.com /technetwork/topics/security/bulletinapr2016-2952098.html · x_refsource_CONFIRM, x_transferred
  • security.netapp.com /advisory/ntap-20171004-0002/ · x_refsource_CONFIRM, x_transferred
  • security.freebsd.org /advisories/FreeBSD-SA-16:16.ntp.asc · vendor-advisory, x_refsource_FREEBSD, x_transferred
  • security.gentoo.org /glsa/201607-15 · vendor-advisory, x_refsource_GENTOO, x_transferred

Sources

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