ALAS-2018-1083


Amazon Linux AMI Security Advisory: ALAS-2018-1083
Advisory Release Date: 2018-09-19 23:35 Pacific
Severity: Low

Issue Overview:

ntpd in ntp 4.2.x before 4.2.8p7 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 .(CVE-2018-7170 )

The ntpq and ntpdc command-line utilities that are part of ntp package are vulnerable to stack-based buffer overflow via crafted hostname. Applications using these vulnerable utilities with an untrusted input may be potentially exploited, resulting in a crash or arbitrary code execution under privileges of that application.(CVE-2018-12327 )


Affected Packages:

ntp


Issue Correction:
Run yum update ntp to update your system.

New Packages:
i686:
    ntpdate-4.2.8p12-1.39.amzn1.i686
    ntp-4.2.8p12-1.39.amzn1.i686
    ntp-debuginfo-4.2.8p12-1.39.amzn1.i686

noarch:
    ntp-perl-4.2.8p12-1.39.amzn1.noarch
    ntp-doc-4.2.8p12-1.39.amzn1.noarch

src:
    ntp-4.2.8p12-1.39.amzn1.src

x86_64:
    ntp-debuginfo-4.2.8p12-1.39.amzn1.x86_64
    ntp-4.2.8p12-1.39.amzn1.x86_64
    ntpdate-4.2.8p12-1.39.amzn1.x86_64