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Red Hat Enterprise Linux 7: RHSA-2020-2663 Moderate: NTP DoS Risk

red hat
Calendar Grey June 23, 2020
Dist Redhat Esm H88
A new ntp security patch for Red Hat Enterprise Linux classified as Moderate affects the synchronization of system time and overall security measures.
An update for ntp is now available for Red Hat Enterprise Linux 7

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory update DoS Red Hat Enterprise Linux Moderate ntp network time protocol

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

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

Read the Full Advisory


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

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update DoS Red Hat Enterprise Linux Moderate ntp network time protocol

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

Bugs Fixed

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

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