vulnwire
5.3med

CVE-2016-1547

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fe…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
5.3
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
5.1%
percentile 92%
Public exploits
0
none known

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.

Exploit prediction (EPSS)

5.07% probability of exploitation in the next 30 days, higher than 92% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.05.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • NTP Project NTP
  • NTPsec Project NTPSec

Classification

Weakness
  • CWE-20 Improper Input Validation

References

  • securityfocus.com /bid/88276 · vdb-entry, x_refsource_BID, x_transferred
  • debian.org /security/2016/dsa-3629 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • oracle.com /technetwork/topics/security/linuxbulletinapr2016-2952096.html · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2016:1141 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • rhn.redhat.com /errata/RHSA-2016-1552.html · vendor-advisory, x_refsource_REDHAT, 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
  • talosintelligence.com /reports/TALOS-2016-0081/ · x_refsource_MISC, 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
  • cert-portal.siemens.com /productcert/pdf/ssa-497656.pdf · x_refsource_CONFIRM, x_transferred
  • us-cert.cisa.gov /ics/advisories/icsa-21-103-11 · x_refsource_CONFIRM, x_transferred
  • cert-portal.siemens.com /productcert/pdf/ssa-211752.pdf · x_refsource_CONFIRM, x_transferred
  • arista.com /en/support/advisories-notices/security-advisories/1332-security-advisory-19 · x_refsource_MISC, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.