synced 11 MIN AGO
01 Record

CVE-2016-4953

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector

02 Description

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
17.24% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 96.8% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2016-07-05 01:00Z10 YR AGO
Last updated
2024-08-06 00:46Z2 YR AGO
Reserved
2016-05-23
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-287Improper AuthenticationClass
Data version
5.1
Document digest
3d929e739750f07f8295353a6dd54b53609f2dacd7c682c288bd6ffc30c6dca7

05 Affected products

VendorProductVersionsPlatforms
ntpntpNot specified—
opensuseleapNot specified—
opensuseopensuseNot specified—
oraclesolarisNot specified—
redhatenterprise_linuxNot specified—
siemenssimatic_net_cp_443-1_opc_uaNot specified—
siemenstim_4r-ieNot specified—
siemenstim_4r-ie_dnp3Not specified—
siemenstim_4r-ie_dnp3_firmwareNot specified—
siemenstim_4r-ie_firmwareNot specified—
suselinux_enterprise_desktopNot specified—
suselinux_enterprise_serverNot specified—
susemanagerNot specified—
susemanager_proxyNot specified—
suseopenstack_cloudNot specified—

06 References

07 Fixed in

Debian 11

  • ntp
    Fixed in 1:4.2.8p8+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.