ntp: ntpd control message crash on crafted NUL-byte in configuration directive (VU#668167)
Published Aug 24, 2017
5.3
MEDIUMCVSS 3.0
EPSS 4.09%
Description
ntpd in ntp before 4.2.8p3 with remote configuration enabled allows remote authenticated users with knowledge of the configuration password and access to a computer entrusted to perform remote configuration to cause a denial of service (service crash) via a NULL byte in a crafted configuration directive packet.
Affected products
No data.
Configuration 1
- 21
- 22
- 23
Configuration 2
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 5
ntp
Not affected
Red Hat Enterprise Linux 6
ntp
Will not fix
Red Hat Enterprise Linux 7
ntp
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Not affected | n/a |
| Red Hat Enterprise Linux 6 | ntp | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | ntp | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.09% (0.04095) | 90.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.09% (0.04095) | 89.39th | v5 (v2026.06.15) |
| Dec 28, 2025 | 2.53% (0.02529) | 85.01th | v4 (v2025.03.14) |
| Dec 27, 2025 | 1.45% (0.01450) | 80.39th | v4 (v2025.03.14) |
| Dec 13, 2025 | 2.68% (0.02684) | 85.38th | v4 (v2025.03.14) |
| Sep 5, 2025 | 1.25% (0.01249) | 78.55th | v4 (v2025.03.14) |
| Apr 11, 2025 | 2.51% (0.02510) | 84.10th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.79% (0.03785) | 87.29th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.48% (0.02479) | 89.75th | v3 (v2023.03.01) |
| Dec 12, 2024 | 1.11% (0.01111) | 85.18th | v3 (v2023.03.01) |
| Jun 14, 2024 | 1.14% (0.01144) | 84.82th | v3 (v2023.03.01) |
| Apr 10, 2024 | 1.02% (0.01023) | 83.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.03% (0.01025) | 81.51th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.81% (0.01815) | 77.08th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.81% (0.01815) | 77.03th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.81% (0.01815) | 75.00th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.81% (0.01815) | 54.30th | v2 (v2022.01.01) |
References (15)
- http://bugs.ntp.org/show_bug.cgi?id=2853 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#June_2015_NTP_Security_Vulnerabi
- http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu x_refsource_CONFIRMVendor Advisory
- http://www.debian.org/security/2015/dsa-3388 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.securityfocus.com/bid/75589 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1034168 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-5146 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1238136 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-5146
- https://security.gentoo.org/glsa/201509-01 vendor-advisoryx_refsource_GENTOOMitigationThird Party AdvisoryVDB Entry
- https://security.netapp.com/advisory/ntap-20180731-0003/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2015-5146
Change history (0)
No recorded changes yet.