MEDIUM
ntp: nextvar() missing length check in ntpq
Published Jan 30, 2017
6.2
MEDIUMCVSS 3.0
EPSS 0.64%
Description
The nextvar function in NTP before 4.2.8p6 and 4.3.x before 4.3.90 does not properly validate the length of its input, which allows an attacker to cause a denial of service (application crash).
Affected products
No data.
OR
- ≤ 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 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 as they do not include the affected code, which was introduced in version 4.2.8 of NTP.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.2 MEDIUM NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
2.1 LOW NVD
AV:L/AC:L/Au:N/C:N/I:N/A:P
Access Vector Local
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.
0.64% 0.00640
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00640
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.64% (0.00640) | 48.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.63% (0.00634) | 45.44th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.57% (0.00567) | 66.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.24% (0.00243) | 64.87th | v3 (v2023.03.01) |
| May 18, 2024 | 0.24% (0.00243) | 64.26th | v3 (v2023.03.01) |
| Jan 3, 2024 | 0.24% (0.00243) | 62.25th | v3 (v2023.03.01) |
| May 6, 2023 | 0.22% (0.00218) | 58.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.31% (0.00306) | 65.03th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
Weaknesses (2)
References (26)
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://support.ntp.org/bin/view/Main/NtpBug2937 x_refsource_CONFIRMVendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p6_Securit
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd vendor-advisoryx_refsource_CISCOThird Party Advisory
- http://www.securityfocus.com/bid/81959 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1034782 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.talosintel.com/reports/TALOS-2016-0072/
- http://www.ubuntu.com/usn/USN-3096-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-7975 Vendor Advisory
- https://bto.bluecoat.com/security-advisory/sa113 x_refsource_CONFIRMThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1300267 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-2015-7975
- 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_GENTOOThird Party Advisory
- https://security.netapp.com/advisory/ntap-20171031-0001/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2015-7975
- 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.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 30, 2017
Updated Aug 6, 2024
Reserved Oct 23, 2015
Link CVE-2015-7975
CISA Vulnrichment
Updated n/a