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AUSCERT External Security Bulletin Redistribution
ESB-2020.2187
ntp security update
24 June 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: ntp
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-13817 CVE-2020-11868
Reference: ESB-2020.1918
ESB-2020.1596
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:2663
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Red Hat Security Advisory
Synopsis: Moderate: ntp security update
Advisory ID: RHSA-2020:2663-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2663
Issue date: 2020-06-23
CVE Names: CVE-2020-11868 CVE-2020-13817
=====================================================================
1. Summary:
An update for ntp is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64
3. Description:
The Network Time Protocol (NTP) is used to synchronize a computer's time
with another referenced time source. These packages include the ntpd
service which continuously adjusts system time and utilities used to query
and configure the ntpd service.
Security Fix(es):
* ntp: ntpd using highly predictable transmit timestamps could result in
time change or DoS (CVE-2020-13817)
* ntp: DoS on client ntpd using server mode packet (CVE-2020-11868)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
After installing this update, the ntpd daemon will restart automatically.
5. Bugs fixed (https://bugzilla.redhat.com/):
1716665 - CVE-2020-11868 ntp: DoS on client ntpd using server mode packet
1811627 - CVE-2020-13817 ntp: ntpd using highly predictable transmit timestamps could result in time change or DoS
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
ntp-4.2.6p5-29.el7_8.2.src.rpm
x86_64:
ntp-4.2.6p5-29.el7_8.2.x86_64.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
ntpdate-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-29.el7_8.2.noarch.rpm
ntp-perl-4.2.6p5-29.el7_8.2.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
sntp-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
ntp-4.2.6p5-29.el7_8.2.src.rpm
x86_64:
ntp-4.2.6p5-29.el7_8.2.x86_64.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
ntpdate-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-29.el7_8.2.noarch.rpm
ntp-perl-4.2.6p5-29.el7_8.2.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
sntp-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
ntp-4.2.6p5-29.el7_8.2.src.rpm
ppc64:
ntp-4.2.6p5-29.el7_8.2.ppc64.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.ppc64.rpm
ntpdate-4.2.6p5-29.el7_8.2.ppc64.rpm
ppc64le:
ntp-4.2.6p5-29.el7_8.2.ppc64le.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.ppc64le.rpm
ntpdate-4.2.6p5-29.el7_8.2.ppc64le.rpm
s390x:
ntp-4.2.6p5-29.el7_8.2.s390x.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.s390x.rpm
ntpdate-4.2.6p5-29.el7_8.2.s390x.rpm
x86_64:
ntp-4.2.6p5-29.el7_8.2.x86_64.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
ntpdate-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-29.el7_8.2.noarch.rpm
ntp-perl-4.2.6p5-29.el7_8.2.noarch.rpm
ppc64:
ntp-debuginfo-4.2.6p5-29.el7_8.2.ppc64.rpm
sntp-4.2.6p5-29.el7_8.2.ppc64.rpm
ppc64le:
ntp-debuginfo-4.2.6p5-29.el7_8.2.ppc64le.rpm
sntp-4.2.6p5-29.el7_8.2.ppc64le.rpm
s390x:
ntp-debuginfo-4.2.6p5-29.el7_8.2.s390x.rpm
sntp-4.2.6p5-29.el7_8.2.s390x.rpm
x86_64:
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
sntp-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
ntp-4.2.6p5-29.el7_8.2.src.rpm
x86_64:
ntp-4.2.6p5-29.el7_8.2.x86_64.rpm
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
ntpdate-4.2.6p5-29.el7_8.2.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
noarch:
ntp-doc-4.2.6p5-29.el7_8.2.noarch.rpm
ntp-perl-4.2.6p5-29.el7_8.2.noarch.rpm
x86_64:
ntp-debuginfo-4.2.6p5-29.el7_8.2.x86_64.rpm
sntp-4.2.6p5-29.el7_8.2.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2020-11868
https://access.redhat.com/security/cve/CVE-2020-13817
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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