Low severity3.7NVD Advisory· Published Jan 27, 2017· Updated Jun 17, 2026
CVE-2016-1551
CVE-2016-1551
Description
ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
21- 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
- NTP Project/NTPv5Range: 4.2.8p3
- NTPsec Project/NTPSecv5Range: 3e160db8dc248a0bcb053b56a80167dc742d2b74
Patches
Vulnerability mechanics
References
7- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlnvdThird Party Advisory
- www.securityfocus.com/bid/88219nvdThird Party AdvisoryVDB Entry
- www.talosintelligence.com/reports/TALOS-2016-0132/nvdThird Party Advisory
- 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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