HIGH
ntp: Improper use of snprintf() in mx4200_send()
Published Mar 27, 2017
7.8
HIGHCVSS 3.0
EPSS 0.48%
Description
The mx4200_send function in the legacy MX4200 refclock in NTP before 4.2.8p10 and 4.3.x before 4.3.94 does not properly handle the return value of the snprintf function, which allows local users to execute arbitrary code via unspecified vectors, which trigger an out-of-bounds memory write.
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
- 4.3.9
- 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
- 4.3.90
- 4.3.91
- 4.3.92
- 4.3.93
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 mitigation
Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.8 HIGH NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (Red Hat) ▾
7.0 HIGH Red Hat
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
4.6 MEDIUM NVD
AV:L/AC:L/Au:N/C:P/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.48% 0.00481
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00481
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.48% (0.00481) | 39.24th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.48% (0.00481) | 37.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.17% (0.00170) | 35.91th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.93th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.55% (0.01554) | 33.66th | v1 |
| Jan 6, 2022 | 1.55% (0.01554) | 32.96th | v1 |
| Sep 1, 2021 | 1.55% (0.01554) | 73.02th | v1 |
| Apr 14, 2021 | 1.55% (0.01554) | 0.00th | v1 |
Weaknesses (2)
References (11)
- http://support.ntp.org/bin/view/Main/NtpBug3378 x_refsource_CONFIRMPatchVendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/97058 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038123 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039427 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2017-6451 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1434011 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-6451
- https://support.apple.com/HT208144 x_refsource_CONFIRM
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2017-6451
| Link | Providers | Tags |
|---|---|---|
| http://support.ntp.org/bin/view/Main/NtpBug3378 | x_refsource_CONFIRMPatchVendor Advisory | |
| http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu | x_refsource_CONFIRMVendor Advisory | |
| http://www.securityfocus.com/bid/97058 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1038123 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039427 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2017-6451 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1434011 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-6451 | ||
| https://support.apple.com/HT208144 | x_refsource_CONFIRM | |
| https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2017-6451 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 27, 2017
Updated Aug 5, 2024
Reserved Mar 3, 2017
Link CVE-2017-6451
CISA Vulnrichment
Updated n/a