HOMEVULNERABILITIESCVE-2018-7170
MEDIUM

CVE-2018-7170

NVD-CWE-noinfoPublished: March 6, 2018· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official Description

ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim's clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549.

NVD Source

Technical Analysis

CVE-2018-7170 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 5.3.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

hpe1 product(s)
hpux-ntp
netapp2 product(s)
hcisolidfire
ntp1 product(s)
ntp
synology6 product(s)
router managerskynasvirtual diskstation managerdiskstation managervs960hd firmwarevs960hd
Source: NVD CPE · 11 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html
ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug3415
ADVISORYhttp://www.securityfocus.com/archive/1/541824/100/0/threaded
ADVISORYhttp://www.securityfocus.com/bid/103194
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1550214
ADVISORYhttps://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc
ADVISORYhttps://security.gentoo.org/glsa/201805-12
ADVISORYhttps://security.netapp.com/advisory/ntap-20180626-0001/
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
ADVISORYhttps://www.synology.com/support/security/Synology_SA_18_13
ADVISORYhttp://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html
ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug3415
ADVISORYhttp://www.securityfocus.com/archive/1/541824/100/0/threaded
ADVISORYhttp://www.securityfocus.com/bid/103194
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1550214
ADVISORYhttps://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc
ADVISORYhttps://security.gentoo.org/glsa/201805-12
ADVISORYhttps://security.netapp.com/advisory/ntap-20180626-0001/
ADVISORYhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
ADVISORYhttps://www.synology.com/support/security/Synology_SA_18_13

All References (20)

→
http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.htmlThird Party Advisory · VDB Entry
→
http://support.ntp.org/bin/view/Main/NtpBug3415Third Party Advisory
→
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party Advisory · VDB Entry
→
http://www.securityfocus.com/bid/103194Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=1550214Issue Tracking · Third Party Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.ascThird Party Advisory
→
https://security.gentoo.org/glsa/201805-12Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20180626-0001/Third Party Advisory
→
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_usThird Party Advisory
→
https://www.synology.com/support/security/Synology_SA_18_13Third Party Advisory
→
http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.htmlThird Party Advisory · VDB Entry
→
http://support.ntp.org/bin/view/Main/NtpBug3415Third Party Advisory
→
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party Advisory · VDB Entry
→
http://www.securityfocus.com/bid/103194Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=1550214Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2018-7170
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected4 vendor(s)
PublishedMar 6, 2018

Related CVEs (NVD-CWE-noinfo)

CVE-2014-8440
10.0
CVE-2010-0425
10.0
CVE-2013-2470
10.0
CVE-2006-0287
10.0
CVE-2015-0318
10.0
CVE-2007-5108
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-7170 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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