Amazon Linux 2 Security Advisory: ALAS-2021-1706
Advisory Release Date: 2021-09-08 23:35 Pacific
Advisory Updated Date: 2021-09-15 17:51 Pacific
Severity:
Medium
Issue Overview:
The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013. (CVE-2013-5211)
Affected Packages:
ntp
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update ntp to update your system.
New Packages:
aarch64:
ntp-4.2.8p15-3.amzn2.0.4.aarch64
ntpdate-4.2.8p15-3.amzn2.0.4.aarch64
sntp-4.2.8p15-3.amzn2.0.4.aarch64
ntp-debuginfo-4.2.8p15-3.amzn2.0.4.aarch64
i686:
ntp-4.2.8p15-3.amzn2.0.4.i686
ntpdate-4.2.8p15-3.amzn2.0.4.i686
sntp-4.2.8p15-3.amzn2.0.4.i686
ntp-debuginfo-4.2.8p15-3.amzn2.0.4.i686
noarch:
ntp-perl-4.2.8p15-3.amzn2.0.4.noarch
ntp-doc-4.2.8p15-3.amzn2.0.4.noarch
src:
ntp-4.2.8p15-3.amzn2.0.4.src
x86_64:
ntp-4.2.8p15-3.amzn2.0.4.x86_64
ntpdate-4.2.8p15-3.amzn2.0.4.x86_64
sntp-4.2.8p15-3.amzn2.0.4.x86_64
ntp-debuginfo-4.2.8p15-3.amzn2.0.4.x86_64