CVE-2016-7426
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent
02 Description
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent
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
- 12.36% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 96.1% 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
- 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-400Uncontrolled Resource ConsumptionClass
- Data version
- 5.1
- Document digest
- ed85f7f0e7a14d204b3806b25d70184f7dc4047f61208139243cbee084eed66e
05 Affected products
06 References
- h20566.www2.hpe.comhttps://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
- usn.ubuntu.comUSN-3707-2https://usn.ubuntu.com/3707-2/
- rhn.redhat.comRHSA-2017:0252http://rhn.redhat.com/errata/RHSA-2017-0252.html
- support.ntp.orghttp://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
- nwtime.orghttp://nwtime.org/ntp428p9_release/
- www.kb.cert.orgVU#633847https://www.kb.cert.org/vuls/id/633847
- www.securitytracker.com1037354http://www.securitytracker.com/id/1037354
- bto.bluecoat.comhttps://bto.bluecoat.com/security-advisory/sa139
- support.ntp.orghttp://support.ntp.org/bin/view/Main/NtpBug3071
- security.freebsd.orgFreeBSD-SA-16:39https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
- www.securityfocus.com94451http://www.securityfocus.com/bid/94451
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 14.04 LTS
- ntp Fixed in 1:4.2.6.p5+dfsg-3ubuntu2.14.04.11
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. 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.