Home/CVE/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
CVE

CVE-2018-7170

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

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.

MEDIUM · CVSS 5.3 EPSS 0.00536
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
▤

Affected Products & Versions

11
ntp>= 4.2.0 and < 4.2.8
ntp>= 4.3.0 and < 4.3.92
ntpall versions
synology router manager>= 1.1 and < 1.1.6-6931-3
synology skynas< 6.1.5-15254
synology virtual diskstation manager< 6.1.6-15266
synology diskstation manager>= 5.2 and < 6.1.6-15266
synology vs960hd firmware< 2.2.3-1505
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · Slackware-Security-Advisory-ntp-Updates.htmlpacketstormsecurity.com
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Mar 2018 · 08:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

12
suse-csafopenSUSE-SU-2024:11102-1
suse-csafSUSE-SU-2018:3342-2
suse-csafSUSE-SU-2018:3386-1
suse-csafSUSE-SU-2018:3342-1
suse-csafSUSE-SU-2018:3351-1
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://support.ntp.org/bin/view/Main/NtpBug3415Third Party Advisory
http://www.securityfocus.com/archive/1/541824/100/0/threadedThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/103194Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1550214Issue TrackingThird Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.ascThird Party Advisory
https://security.gentoo.org/glsa/201805-12Third Party Advisory
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