01 Record

CVE-2016-7431

NTP before 4.2.8p9 allows remote attackers to bypass the origin timestamp protection mechanism via an origin timestamp of zero. NOTE: this vulnerability exists because of a CVE-2015-8138 regression.

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

NTP before 4.2.8p9 allows remote attackers to bypass the origin timestamp protection mechanism via an origin timestamp of zero. NOTE: this vulnerability exists because of a CVE-2015-8138 regression.

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: 8.87% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 95.1% 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:L/A:N
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. 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-20Improper Input ValidationClass

Data version

5.1

Document digest

db60dbc0ea975bcb668655174fa6996c8c32844a37848d2741bd1fc2efa086d3

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
support.hpe.comhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_usx_refsource_CONFIRM
www.securityfocus.com94454http://www.securityfocus.com/bid/94454vdb-entryx_refsource_BID
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
support.hpe.comhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_usx_refsource_CONFIRM
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
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/NtpBug3102x_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
support.hpe.comhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en&docId=emr_na-hpesbhf03899en_usx_refsource_CONFIRM
www.ubuntu.comUSN-3349-1http://www.ubuntu.com/usn/USN-3349-1vendor-advisoryx_refsource_UBUNTU
support.hpe.comhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en&docId=emr_na-hpesbhf03883en_usx_refsource_CONFIRM
www.huawei.comhttp://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-enx_refsource_CONFIRM
www.broadcom.comhttps://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-223/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
packetstormsecurity.comhttp://packetstormsecurity.com/files/140240/FreeBSD-Security-Advisory-FreeBSD-SA-16.39.ntp.htmlx_refsource_MISC
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.

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.