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Red Hat Enterprise Linux 7 RHSA-2018:0855-01 Moderate NTP DoS Fix

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Calendar Grey April 10, 2018
Scroller Redhat
A new update for ntp is now available in Red Hat Linux to resolve security vulnerabilities, including potential Denial of Service (DoS) risks and various bug fixes.
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: Authenticated DoS via Malicious Config Option (CVE-2017-6463)
* ntp: Denial of Service via Malformed Config (CVE-2017-6464)
* ntp: Buffer Overflow in DPTS Clock (CVE-2017-6462)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank the NTP project for reporting these issues. Upstream acknowledges Cure53 as the original reporter of these issues.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate denial of service bug fix red hat enterprise linux ntp security

References

https://access.redhat.com/security/cve/CVE-2017-6462 https://access.redhat.com/security/cve/CVE-2017-6463 https://access.redhat.com/security/cve/CVE-2017-6464 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/7.5_release_notes/index.html

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: ntp-4.2.6p5-28.el7.src.rpm
x86_64: ntp-4.2.6p5-28.el7.x86_64.rpm ntp-debuginfo-4.2.6p5-28.el7.x86_64.rpm ntpdate-4.2.6p5-28.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: ntp-doc-4.2.6p5-28.el7.noarch.rpm ntp-perl-4.2.6p5-28.el7.noarch.rpm
x86_64: ntp-debuginfo-4.2.6p5-28.el7.x86_64.rpm sntp-4.2.6p5-28.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: ntp-4.2.6p5-28.el7.src.rpm
x86_64: ntp-4.2.6p5-28.el7.x86_64.rpm ntp-debuginfo-4.2.6p5-28.el7.x86_64.rpm ntpdate-4.2.6p5-28.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch: ntp-doc-4.2.6p5-28.el7.noarch.rpm ntp-perl-4.2.6p5-28.el7.noarch.rpm
x86_64: ntp-debuginfo-4.2.6p5-28.el7.x86_64.rpm sntp-4.2.6p5-28.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: ntp-4.2.6p5-28.el7.src.rpm
ppc64: ntp-4.2.6p5-28.el7.ppc64.rpm ntp-debuginfo-4.2.6p5-28.el7.ppc64.rpm ntpdate-4.2.6p5-28.el7.ppc64.rpm
ppc64le: ntp-4.2.6p5-28.el7.ppc64le.rpm ntp-debuginfo-4.2.6p5-28.el7.ppc64le.rpm ntpdate-4.2.6p5-28.el7.ppc64le.rpm
s390x: ntp-4.2.6p5-28.el7.s390x.rpm ntp-debuginfo-4.2.6p5-28.el7.s390x.rpm ntpdate-4.2.6p5-28.el7.s390x.rpm
x86_64: ntp-4.2.6p5-28.el7.x86_64.rpm ntp-debuginfo-4.2.6p5-28.el7.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2018:0855-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0855
Issue date: 2018-04-10

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 moderate denial of service bug fix red hat enterprise linux ntp security

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

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le, s390x

Bugs Fixed

1420453 - Typos in ntpd man page

1433987 - CVE-2017-6464 ntp: Denial of Service via Malformed Config

1433995 - CVE-2017-6462 ntp: Buffer Overflow in DPTS Clock

1434002 - CVE-2017-6463 ntp: Authenticated DoS via Malicious Config Option

1442083 - Delayed name resolving fails when fips is enabled

1466947 - ntpdate.service should start after network-online.target

1491797 - RFE: Backport Spectracom TSYNC driver to ntp

1493452 - ntpd clears STA_UNSYNC on start

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