CVE-2016-7428 json
ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via the poll interval in a…
published 2017-01-13 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8281
- cvss
- 4.3
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.9%
- EPSS 3.9% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via the poll interval in a broadcast packet.
Patch / fix
- ntp Debian 11 1:4.2.8p9+dfsg-1
debian advisories DEBIAN-CVE-2016-7428
- ntp Ubuntu 14.04 LTS 1:4.2.6.p5+dfsg-3ubuntu2.14.04.11
- ntp Ubuntu 16.04 LTS 1:4.2.8p4+dfsg-3ubuntu5.5
ubuntu advisories UBUNTU-CVE-2016-7428
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- ntp SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLES 11 SP2-LTSS +4 more 4.2.8p9-48.9.1
- ntp SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +4 more 4.2.8p9-55.1
- ntp SLES for SAP 11 SP4, SLES 11 SP4 4.2.8p9-57.2
- ntp SLES for SAP 12, SLES 12-LTSS 4.2.8p9-46.18.1
suse advisories SUSE-SU-2017:0255-1SUSE-SU-2016:3195-1SUSE-SU-2016:3196-1SUSE-SU-2016:3193-1
- ntp openSUSE Tumbleweed 4.2.8p9-1.1
opensuse advisories openSUSE-SU-2024:10181-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2016-7428 updated cvss 4.3
ntp: Broadcast Mode Poll Interval Enforcement DoS
-
Red Hat Enterprise Linux 5 ntp Red Hat Enterprise Linux 6 ntp, ntpdate, ntp-perl Red Hat Enterprise Linux 7 ntp, sntp, ntpdate, ntp-perlnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
3.91% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.3 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVD | 2.0 | 3.3 | AV:A/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
usn.ubuntu.com
/3707-2/
vendor-advisory
-
security.freebsd.org
/advisories/FreeBSD-SA-16:39.ntp.asc
vendor-advisory
-
support.ntp.org
/bin/view/Main/NtpBug3113
issue-tracking, mitigation, vendor-advisory
-
support.ntp.org
/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
vendor-advisory
-
nwtime.org
/ntp428p9_release/
release-notes, vendor-advisory
- h20566.www2.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
- support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
-
securityfocus.com
/bid/94446
vdb-entry, third-party-advisory
-
kb.cert.org
/vuls/id/633847
third-party-advisory, us-government-resource
- support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
-
securitytracker.com
/id/1037354
vdb-entry
- bto.bluecoat.com /security-advisory/sa139
Sources
- CVE List CVE-2016-7428
- NVD CVE-2016-7428
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.