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Ubuntu CVE Tracker
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CVE-2018-7170

Priority
Low

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.

References
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7170
http://www.kb.cert.org/vuls/id/961909
http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S

Bugs
http://support.ntp.org/bin/view/Main/NtpBug3415

Notes



Package
Source: ntp (LP Ubuntu Debian)

Upstream:released (4.2.8p11) Ubuntu 18.04 LTS (Bionic Beaver):needed Ubuntu
20.04 LTS (Focal Fossa):released (1:4.2.8p11+dfsg-1ubuntu1) Ubuntu 21.10 (Impish
Indri):released (1:4.2.8p11+dfsg-1ubuntu1) Ubuntu 16.04 ESM (Xenial
Xerus):needed Ubuntu 14.04 ESM (Trusty Tahr):needed

Patches:

Upstream:http://bk.ntp.org/ntp-stable/?PAGE=cset&REV=5a5dab3a2_FQ3mvEDDduCKFCgMUHxg
Upstream:http://bk.ntp.org/ntp-stable/?PAGE=cset&REV=5a5ecbd3TlxNJ-4bhpgNPrNnk0qyRA
Upstream:http://bk.ntp.org/ntp-stable/?PAGE=cset&REV=5a682fbb3GRmeAsQBMaL14IFQKVWIQ
Upstream:http://bk.ntp.org/ntp-stable/?PAGE=cset&REV=5a6acee9cAeq0Mxp-nKXzoZdyFjupQ

More Information
 * Mitre
 * NVD
 * Launchpad
 * Debian

Updated: 2022-02-10 22:33:27 UTC (commit
acb3d89ab51f1d5e5543fa993969c0eb13c71f04)

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