ntp: password length memory corruption vulnerability
Published Aug 7, 2017
8.8
HIGHCVSS 3.1
EPSS 14.56%
Description
Buffer overflow in the password management functionality in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to cause a denial of service (daemon crash) or possibly execute arbitrary code via a crafted key file.
Affected products
No data.
Configuration 1
- ≥ 4.2.0 · < 4.2.8
- ≥ 4.3.0 · < 4.3.77
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
Configuration 2
- n/a
- n/a
- n/a
- n/a
- n/a
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.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:P/I:P/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 | 14.56% (0.14560) | 96.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 14.56% (0.14560) | 96.20th | v5 (v2026.06.15) |
| May 21, 2026 | 3.16% (0.03157) | 87.07th | v4 (v2025.03.14) |
| May 13, 2026 | 4.48% (0.04478) | 89.19th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.31% (0.03305) | 86.08th | v4 (v2025.03.14) |
| Mar 29, 2025 | 10.77% (0.10770) | 88.85th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.31% (0.03305) | 86.39th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.92% (0.02920) | 90.57th | v3 (v2023.03.01) |
| Dec 12, 2024 | 0.96% (0.00961) | 83.95th | v3 (v2023.03.01) |
| Apr 16, 2024 | 0.84% (0.00836) | 81.81th | v3 (v2023.03.01) |
| Jul 18, 2023 | 0.84% (0.00836) | 79.81th | v3 (v2023.03.01) |
| Jun 17, 2023 | 0.82% (0.00820) | 79.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.77% (0.00765) | 78.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.18% (0.04180) | 86.11th | v2 (v2022.01.01) |
| May 4, 2022 | 4.18% (0.04180) | 84.83th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.07% (0.04069) | 84.57th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.07% (0.04069) | 68.02th | v2 (v2022.01.01) |
References (11)
- http://support.ntp.org/bin/view/Main/NtpBug2921 x_refsource_CONFIRMPatchVendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner
- http://talosintel.com/reports/TALOS-2015-0065/
- http://www.securityfocus.com/bid/77277 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1033951 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-7854 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1274263 x_refsource_CONFIRMIssue TrackingThird Party AdvisoryVDB Entry
- https://nvd.nist.gov/vuln/detail/CVE-2015-7854
- https://security.gentoo.org/glsa/201607-15 vendor-advisoryx_refsource_GENTOOThird Party AdvisoryVDB Entry
- https://security.netapp.com/advisory/ntap-20171004-0001/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7854
| Link | Providers | Tags |
|---|---|---|
| http://support.ntp.org/bin/view/Main/NtpBug2921 | x_refsource_CONFIRMPatchVendor Advisory | |
| http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner | ||
| http://talosintel.com/reports/TALOS-2015-0065/ | ||
| http://www.securityfocus.com/bid/77277 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1033951 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2015-7854 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1274263 | x_refsource_CONFIRMIssue TrackingThird Party AdvisoryVDB Entry | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-7854 | ||
| https://security.gentoo.org/glsa/201607-15 | vendor-advisoryx_refsource_GENTOOThird Party AdvisoryVDB Entry | |
| https://security.netapp.com/advisory/ntap-20171004-0001/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2015-7854 |
Change history (0)
No recorded changes yet.