Vulnerability in NTP
CVE-2016-1549
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.031 (87.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
- NTP — versions 4.2.8
- NTP Project — versions 4.2.8p3, 4.2.8p4
- Ntpsec Project — versions 3e160db8dc248a0bcb053b56a80167dc742d2b74, a5fb34b9cc89b92a8fef2f459004865c93bb7f92
Weakness classification (CWE)
References
- www.talosintelligence.com/reports/TALOS-2016-0083/ (Technical Description, Third Party Advisory, Mitigation)
- www.securityfocus.com/bid/88200 (vdb-entry)
- www.securitytracker.com/id/1035705 (vdb-entry)
- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- security.netapp.com/advisory/ntap-20171004-0002/
- security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc (vendor-advisory)
- www.synology.com/support/security/Synology_SA_18_13
- security.gentoo.org/glsa/201607-15 (vendor-advisory)
- support.hpe.com/hpsc/doc/public/display
Frequently asked questions
- What is CVE-2016-1549?
- CVE-2016-1549 is a medium-severity vulnerability in NTP, classified under CWE-19. CVSS score: 6.5/10. Published 2017-01-06.
- How severe is CVE-2016-1549?
- Medium severity. CVSS v3 base score is 6.5 out of 10.