CVE-2016-1549
Summary
| CVE | CVE-2016-1549 |
|---|---|
| State | PUBLISHED |
| Assigner | certcc |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2017-01-06 21:59:00 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock. |
Risk And Classification
Primary CVSS: v3.0 6.5 MEDIUM from [email protected]
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.009690000 probability, percentile 0.767060000 (date 2026-05-11)
Problem Types: CWE-19 | unspecified
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| 2.0 | [email protected] | Primary | 4 | AV:N/AC:L/Au:S/C:N/I:P/A:N |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
SingleConfidentiality
NoneIntegrity
PartialAvailability
NoneAV:N/AC:L/Au:S/C:N/I:P/A:N
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | NTP Project | NTP | affected 4.2.8p3 | Not specified |
| CNA | NTP Project | NTP | affected 4.2.8p4 | Not specified |
| CNA | NTPsec Project | NTPSec | affected 3e160db8dc248a0bcb053b56a80167dc742d2b74 | Not specified |
| CNA | NTPsec Project | NTPSec | affected a5fb34b9cc89b92a8fef2f459004865c93bb7f92 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Document Display | HPE Support Center | af854a3a-2127-422b-91ae-364da2661108 | support.hpe.com | |
| April 2016 Network Time Protocol Daemon (ntpd) Vulnerabilities in Multiple NetApp Products | NetApp Product Security | af854a3a-2127-422b-91ae-364da2661108 | security.netapp.com | |
| security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc | af854a3a-2127-422b-91ae-364da2661108 | security.FreeBSD.org | |
| NTP CVE-2016-1549 Remote Security Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Cisco Talos - Talos 2016 0083 | af854a3a-2127-422b-91ae-364da2661108 | www.talosintelligence.com | Mitigation, Technical Description, Third Party Advisory |
| NTP: Multiple vulnerabilities (GLSA 201607-15) — Gentoo Security | af854a3a-2127-422b-91ae-364da2661108 | security.gentoo.org | |
| ntp Multiple Bugs Let Remote Users Spoof Messages, Obtain Potentially Sensitive Information, Modify Time, and Deny Service - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Synology Inc. | af854a3a-2127-422b-91ae-364da2661108 | www.synology.com | |
| Oracle Solaris Bulletin - April 2016 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 296087 Oracle Solaris 11.4 Support Repository Update (SRU) 8.1.5 Missing (CPUAPR2019)