01 Record

CVE-2016-7433

NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a "root distance that did not include

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

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02 Description

NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a "root distance that did not include

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: 9.76% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 95.4% of scored records. A rank, not a probability.
NVD base score: 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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

2017-01-13 16:00Z9 YR AGO

Last updated

2024-08-06 01:57Z2 YR AGO

Reserved

2016-09-09

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-682Incorrect CalculationPillar

Data version

5.1

Document digest

f64271173e9c8ae55fba97c57df61a20806869197af2515dac4917775d9f1b1c

05 Affected products

VendorProductVersionsPlatforms

ntpntpNot specified—

redhatenterprise_linuxNot specified—

06 References

h20566.www2.hpe.comhttps://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_usx_refsource_CONFIRM
rhn.redhat.comRHSA-2017:0252http://rhn.redhat.com/errata/RHSA-2017-0252.htmlvendor-advisoryx_refsource_REDHAT
support.ntp.orghttp://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilitiesx_refsource_CONFIRM
nwtime.orghttp://nwtime.org/ntp428p9_release/x_refsource_CONFIRM
www.kb.cert.orgVU#633847https://www.kb.cert.org/vuls/id/633847third-party-advisoryx_refsource_CERT-VN
www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlx_refsource_CONFIRM
www.securitytracker.com1037354http://www.securitytracker.com/id/1037354vdb-entryx_refsource_SECTRACK
bto.bluecoat.comhttps://bto.bluecoat.com/security-advisory/sa139x_refsource_CONFIRM
www.securityfocus.com94455http://www.securityfocus.com/bid/94455vdb-entryx_refsource_BID
security.freebsd.orgFreeBSD-SA-16:39https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.ascvendor-advisoryx_refsource_FREEBSD
support.ntp.orghttp://support.ntp.org/bin/view/Main/NtpBug3067x_refsource_CONFIRM
www.securityfocus.com20170310 [security bulletin] HPESBUX03706 rev.1 - HP-UX NTP service running ntpd, Multiple Vulnerabilitieshttp://www.securityfocus.com/archive/1/540254/100/0/threadedmailing-listx_refsource_BUGTRAQ
www.securityfocus.com20170310 [security bulletin] HPESBUX03706 rev.1 - HP-UX NTP service running ntpd, Multiple Vulnerabilitieshttp://www.securityfocus.com/archive/1/archive/1/540254/100/0/threadedmailing-listx_refsource_BUGTRAQ
lists.opensuse.orgopenSUSE-SU-2016:3280http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.htmlvendor-advisoryx_refsource_SUSE
www.ubuntu.comUSN-3349-1http://www.ubuntu.com/usn/USN-3349-1vendor-advisoryx_refsource_UBUNTU
lists.fedoraproject.orgFEDORA-2016-e8a8561ee7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PABKEYX6ABBFJZGMXKH57X756EJUDS3C/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2016-7209ab4e02https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP/vendor-advisoryx_refsource_FEDORA
www.huawei.comhttp://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-enx_refsource_CONFIRM
lists.fedoraproject.orgFEDORA-2016-c198d15316https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN/vendor-advisoryx_refsource_FEDORA
www.broadcom.comhttps://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227/x_refsource_CONFIRM
www.securityfocus.com20161222 FreeBSD Security Advisory FreeBSD-SA-16:39.ntphttp://www.securityfocus.com/archive/1/539955/100/0/threadedmailing-listx_refsource_BUGTRAQ
www.broadcom.comhttps://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227x_refsource_CONFIRM
www.securityfocus.com20161222 FreeBSD Security Advisory FreeBSD-SA-16:39.ntphttp://www.securityfocus.com/archive/1/archive/1/539955/100/0/threadedmailing-listx_refsource_BUGTRAQ
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdfx_refsource_CONFIRM
us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-159-11x_refsource_MISC

07 Fixed in

Arch Linux

ntp
Fixed in 4.2.8.p9-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

Debian 11

ntp
Fixed in 1:4.2.8p9+dfsg-1

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

Ubuntu 16.04 LTS

ntp
Fixed in 1:4.2.8p4+dfsg-3ubuntu5.5

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. 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.