HIGH
ntp: DoS by oversized UDP packet
Published Jan 13, 2017
7.5
HIGHCVSS 3.0
EPSS 31.19%
Description
ntpd in NTP before 4.2.8p9, when running on Windows, allows remote attackers to cause a denial of service via a large UDP packet.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
ntp
Not affected
Red Hat Enterprise Linux 6
ntp
Not affected
Red Hat Enterprise Linux 7
ntp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Not affected | n/a |
| Red Hat Enterprise Linux 6 | ntp | Not affected | n/a |
| Red Hat Enterprise Linux 7 | ntp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5, 6, and 7. This issue only affected ntpd running on the Windows OS.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
31.19% 0.31192
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.31192
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (41 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 31.19% (0.31192) | 98.22th | v5 (v2026.06.15) |
| Sep 22, 2026 | 31.19% (0.31192) | 98.19th | v5 (v2026.06.15) |
| Sep 21, 2026 | 9.18% (0.09175) | 95.16th | v5 (v2026.06.15) |
| Sep 6, 2026 | 31.19% (0.31192) | 98.15th | v5 (v2026.06.15) |
| Sep 5, 2026 | 9.18% (0.09175) | 95.05th | v5 (v2026.06.15) |
| Aug 30, 2026 | 31.19% (0.31192) | 98.14th | v5 (v2026.06.15) |
| Aug 28, 2026 | 9.18% (0.09175) | 95.02th | v5 (v2026.06.15) |
| Aug 24, 2026 | 31.19% (0.31192) | 98.13th | v5 (v2026.06.15) |
| Aug 23, 2026 | 9.18% (0.09175) | 95.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 31.71% (0.31715) | 98.06th | v5 (v2026.06.15) |
| Dec 28, 2025 | 19.62% (0.19624) | 95.22th | v4 (v2025.03.14) |
| Dec 27, 2025 | 16.91% (0.16914) | 94.78th | v4 (v2025.03.14) |
| Nov 3, 2025 | 19.05% (0.19052) | 95.10th | v4 (v2025.03.14) |
| Nov 1, 2025 | 16.91% (0.16914) | 94.73th | v4 (v2025.03.14) |
| Oct 31, 2025 | 19.05% (0.19052) | 95.06th | v4 (v2025.03.14) |
| Oct 29, 2025 | 16.91% (0.16914) | 94.68th | v4 (v2025.03.14) |
| Oct 28, 2025 | 19.05% (0.19052) | 95.05th | v4 (v2025.03.14) |
| Oct 27, 2025 | 16.91% (0.16914) | 94.70th | v4 (v2025.03.14) |
| Oct 24, 2025 | 19.05% (0.19052) | 95.04th | v4 (v2025.03.14) |
| Oct 22, 2025 | 16.91% (0.16914) | 94.65th | v4 (v2025.03.14) |
| Oct 21, 2025 | 19.05% (0.19052) | 95.03th | v4 (v2025.03.14) |
| Oct 20, 2025 | 16.91% (0.16914) | 94.65th | v4 (v2025.03.14) |
| Oct 19, 2025 | 19.05% (0.19052) | 95.03th | v4 (v2025.03.14) |
| Oct 17, 2025 | 16.91% (0.16914) | 94.64th | v4 (v2025.03.14) |
| Oct 16, 2025 | 19.05% (0.19052) | 95.03th | v4 (v2025.03.14) |
| Oct 14, 2025 | 16.91% (0.16914) | 94.64th | v4 (v2025.03.14) |
| Oct 1, 2025 | 19.05% (0.19052) | 95.14th | v4 (v2025.03.14) |
| Sep 16, 2025 | 16.91% (0.16914) | 94.72th | v4 (v2025.03.14) |
| Sep 2, 2025 | 8.76% (0.08761) | 92.22th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.70% (0.05696) | 89.47th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.20% (0.08204) | 86.75th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.70% (0.05696) | 89.72th | v4 (v2025.03.14) |
| Mar 13, 2025 | 14.01% (0.14006) | 95.78th | v3 (v2023.03.01) |
| Dec 17, 2024 | 17.63% (0.17626) | 96.11th | v3 (v2023.03.01) |
| Apr 15, 2024 | 63.00% (0.62997) | 97.79th | v3 (v2023.03.01) |
| Jan 26, 2024 | 67.26% (0.67257) | 97.66th | v3 (v2023.03.01) |
| Mar 7, 2023 | 70.52% (0.70516) | 97.42th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://nwtime.org/ntp428p9_release/ x_refsource_CONFIRMRelease NotesVendor Advisory
- http://support.ntp.org/bin/view/Main/NtpBug3110 x_refsource_CONFIRMIssue TrackingMitigationVendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/94450 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037354 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2016-9312 Vendor Advisory
- https://bto.bluecoat.com/security-advisory/sa139 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1410014 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-9312
- https://www.cve.org/CVERecord?id=CVE-2016-9312
- https://www.kb.cert.org/vuls/id/633847 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| http://nwtime.org/ntp428p9_release/ | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| http://support.ntp.org/bin/view/Main/NtpBug3110 | x_refsource_CONFIRMIssue TrackingMitigationVendor Advisory | |
| http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities | x_refsource_CONFIRMVendor Advisory | |
| http://www.securityfocus.com/bid/94450 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037354 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2016-9312 | Vendor Advisory | |
| https://bto.bluecoat.com/security-advisory/sa139 | x_refsource_CONFIRM | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1410014 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9312 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-9312 | ||
| https://www.kb.cert.org/vuls/id/633847 | third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 13, 2017
Updated Aug 6, 2024
Reserved Nov 14, 2016
Link CVE-2016-9312
CISA Vulnrichment
Updated n/a