Vulnerability Details : CVE-2016-1551
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.
Exploit prediction scoring system (EPSS) score for CVE-2016-1551
Probability of exploitation activity in the next 30 days: 0.45%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 72 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2016-1551
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
2.6
|
LOW | AV:N/AC:H/Au:N/C:N/I:P/A:N |
4.9
|
2.9
|
NIST |
3.7
|
LOW | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
2.2
|
1.4
|
NIST |
CWE ids for CVE-2016-1551
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Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-1551
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https://security.netapp.com/advisory/ntap-20171004-0002/
April 2016 Network Time Protocol Daemon (ntpd) Vulnerabilities in Multiple NetApp Products | NetApp Product Security
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https://security.gentoo.org/glsa/201607-15
NTP: Multiple vulnerabilities (GLSA 201607-15) — Gentoo security
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http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Oracle Solaris Bulletin - April 2016Third Party Advisory
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http://www.securityfocus.com/bid/88219
NTP CVE-2016-1551 Remote Security VulnerabilityThird Party Advisory;VDB Entry
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
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http://www.talosintelligence.com/reports/TALOS-2016-0132/
TALOS-2016-0132 || Cisco Talos Intelligence Group - Comprehensive Threat IntelligenceThird Party Advisory
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http://www.securitytracker.com/id/1035705
ntp Multiple Bugs Let Remote Users Spoof Messages, Obtain Potentially Sensitive Information, Modify Time, and Deny Service - SecurityTracker
Products affected by CVE-2016-1551
- cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:*
- cpe:2.3:a:ntpsec:ntpsec:a5fb34b9cc89b92a8fef2f459004865c93bb7f92:*:*:*:*:*:*:*