CVE-2016-2516
NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig
02 Description
NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig
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
- 8.94% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 95.0% 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:H/PR:L/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
- 2017-01-30 21:00Z9 YR AGO
- Last updated
- 2024-08-05 23:32Z2 YR AGO
- Reserved
- 2016-02-20
- 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
- 9d6edd3e79c437daed3e889c32c3a600a9d21f76eca50c38ecc9429f69af6496
05 Affected products
06 References
- www.debian.orgDSA-3629http://www.debian.org/security/2016/dsa-3629
- www.securityfocus.com88180http://www.securityfocus.com/bid/88180
- www.kb.cert.orgVU#718152https://www.kb.cert.org/vuls/id/718152
- www.securitytracker.com1035705http://www.securitytracker.com/id/1035705
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20171004-0002/
- support.ntp.orghttp://support.ntp.org/bin/view/Main/NtpBug3011
- security.freebsd.orgFreeBSD-SA-16:16https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
- security.gentoo.orgGLSA-201607-15https://security.gentoo.org/glsa/201607-15
07 Fixed in
Debian 11
- ntp Fixed in 1:4.2.8p7+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-3ubuntu2.14.04.10
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-3ubuntu5.3
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.