ntp: potential infinite loop in ntpq
Published Jan 30, 2017
5.9
MEDIUMCVSS 3.0
EPSS 7.55%
Description
The getresponse function in ntpq in NTP versions before 4.2.8p9 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (infinite loop) via crafted packets with incorrect values.
Affected products
No data.
- ≤ 4.2.8
- 4.3.0
- 4.3.1
- 4.3.2
- 4.3.3
- 4.3.4
- 4.3.5
- 4.3.6
- 4.3.7
- 4.3.8
- 4.3.10
- 4.3.11
- 4.3.12
- 4.3.13
- 4.3.14
- 4.3.15
- 4.3.16
- 4.3.17
- 4.3.18
- 4.3.19
- 4.3.20
- 4.3.21
- 4.3.22
- 4.3.23
- 4.3.24
- 4.3.25
- 4.3.26
- 4.3.27
- 4.3.28
- 4.3.29
- 4.3.30
- 4.3.31
- 4.3.32
- 4.3.33
- 4.3.34
- 4.3.35
- 4.3.36
- 4.3.37
- 4.3.38
- 4.3.39
- 4.3.40
- 4.3.41
- 4.3.42
- 4.3.43
- 4.3.44
- 4.3.45
- 4.3.46
- 4.3.47
- 4.3.48
- 4.3.49
- 4.3.50
- 4.3.51
- 4.3.52
- 4.3.53
- 4.3.54
- 4.3.55
- 4.3.56
- 4.3.57
- 4.3.58
- 4.3.59
- 4.3.60
- 4.3.61
- 4.3.62
- 4.3.63
- 4.3.64
- 4.3.65
- 4.3.66
- 4.3.67
- 4.3.68
- 4.3.69
- 4.3.70
- 4.3.71
- 4.3.72
- 4.3.73
- 4.3.74
- 4.3.75
- 4.3.76
- 4.3.77
- 4.3.78
- 4.3.79
- 4.3.80
- 4.3.81
- 4.3.82
- 4.3.83
- 4.3.84
- 4.3.85
- 4.3.86
- 4.3.87
- 4.3.88
- 4.3.89
No data.
Red Hat Enterprise Linux 7
ntp-0:4.2.6p5-25.el7
Fixed · RHSA-2016:2583
Red Hat Enterprise Linux 5
ntp
Will not fix
Red Hat Enterprise Linux 6
ntp
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | ntp-0:4.2.6p5-25.el7 | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux 5 | ntp | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | ntp | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
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:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/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 (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.55% (0.07546) | 94.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.61% (0.07608) | 93.76th | v5 (v2026.06.15) |
| Feb 18, 2026 | 8.12% (0.08124) | 91.97th | v4 (v2025.03.14) |
| Jan 14, 2026 | 10.64% (0.10640) | 93.07th | v4 (v2025.03.14) |
| Dec 28, 2025 | 15.00% (0.15005) | 94.34th | v4 (v2025.03.14) |
| Dec 27, 2025 | 18.55% (0.18545) | 95.06th | v4 (v2025.03.14) |
| Dec 19, 2025 | 15.00% (0.15005) | 94.33th | v4 (v2025.03.14) |
| Jul 7, 2025 | 18.55% (0.18545) | 94.94th | v4 (v2025.03.14) |
| Mar 30, 2025 | 21.96% (0.21965) | 95.29th | v4 (v2025.03.14) |
| Mar 29, 2025 | 32.89% (0.32887) | 95.13th | v4 (v2025.03.14) |
| Mar 17, 2025 | 21.96% (0.21965) | 95.32th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.19% (0.01189) | 85.75th | v3 (v2023.03.01) |
| May 2, 2024 | 1.19% (0.01189) | 84.94th | v3 (v2023.03.01) |
| Feb 12, 2024 | 1.05% (0.01052) | 83.58th | v3 (v2023.03.01) |
| Jan 3, 2024 | 0.86% (0.00860) | 80.46th | v3 (v2023.03.01) |
| Nov 21, 2023 | 0.97% (0.00975) | 81.66th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.87% (0.00871) | 79.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (17)
- http://rhn.redhat.com/errata/RHSA-2016-2583.html vendor-advisoryx_refsource_REDHAT
- http://support.ntp.org/bin/view/Main/NtpBug2948 x_refsource_CONFIRMVendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p6_Securit
- http://www.debian.org/security/2016/dsa-3629 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/81814 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1034782 vdb-entryx_refsource_SECTRACK
- http://www.talosintel.com/reports/TALOS-2016-0080/
- https://access.redhat.com/security/cve/CVE-2015-8158 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1300273 Issue Tracking
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us x_refsource_CONFIRM
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2015-8158
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc vendor-advisoryx_refsource_FREEBSD
- https://security.gentoo.org/glsa/201607-15 vendor-advisoryx_refsource_GENTOO
- https://security.netapp.com/advisory/ntap-20171031-0001/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2015-8158
- https://www.kb.cert.org/vuls/id/718152 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
Change history (0)
No recorded changes yet.