Medium severity5.3NVD Advisory· Published Jan 30, 2017· Updated Jun 17, 2026
CVE-2016-2517
CVE-2016-2517
Description
NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
109cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:*+ 92 more
- cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.10:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.11:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.12:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.13:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.14:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.15:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.16:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.17:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.18:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.19:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.20:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.21:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.22:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.23:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.24:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.25:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.26:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.27:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.28:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.29:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.30:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.31:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.32:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.33:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.34:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.35:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.36:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.37:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.38:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.39:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.4:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.40:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.41:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.42:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.43:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.44:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.45:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.46:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.47:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.48:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.49:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.5:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.50:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.51:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.52:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.53:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.54:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.55:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.56:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.57:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.58:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.59:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.6:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.60:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.61:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.62:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.63:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.64:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.65:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.66:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.67:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.68:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.69:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.7:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.70:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.71:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.72:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.73:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.74:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.75:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.76:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.77:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.78:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.79:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.8:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.80:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.81:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.82:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.83:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.84:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.85:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.86:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.87:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.88:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.89:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.9:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.90:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.91:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:*:p6:*:*:*:*:*:*range: <=4.2.8
- osv-coords15 versionspkg:rpm/opensuse/ntp&distro=openSUSE%20Tumbleweedpkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/ntp&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/ntp&distro=SUSE%20Manager%202.1pkg:rpm/suse/ntp&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/ntp&distro=SUSE%20OpenStack%20Cloud%205
< 4.2.8p9-1.1+ 14 more
- (no CPE)range: < 4.2.8p9-1.1
- (no CPE)range: < 4.2.8p8-46.8.1
- (no CPE)range: < 4.2.8p7-11.1
- (no CPE)range: < 4.2.8p7-44.1
- (no CPE)range: < 4.2.8p7-44.1
- (no CPE)range: < 4.2.8p7-44.1
- (no CPE)range: < 4.2.8p7-11.1
- (no CPE)range: < 4.2.8p8-46.8.1
- (no CPE)range: < 4.2.8p7-11.1
- (no CPE)range: < 4.2.8p7-11.1
- (no CPE)range: < 4.2.8p8-46.8.1
- (no CPE)range: < 4.2.8p7-11.1
- (no CPE)range: < 4.2.8p7-44.1
- (no CPE)range: < 4.2.8p7-44.1
- (no CPE)range: < 4.2.8p7-44.1
Patches
Vulnerability mechanics
References
8- support.ntp.org/bin/view/Main/NtpBug3010nvdVendor Advisory
- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlnvdThird Party Advisory
- www.securityfocus.com/bid/88189nvdThird Party AdvisoryVDB Entry
- www.kb.cert.org/vuls/id/718152nvdThird Party AdvisoryUS Government Resource
- www.securitytracker.com/id/1035705nvd
- security.freebsd.org/advisories/FreeBSD-SA-16:16.ntp.ascnvd
- security.gentoo.org/glsa/201607-15nvd
- security.netapp.com/advisory/ntap-20171004-0002/nvd
News mentions
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