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Red Hat Enterprise Linux 7: RHSA-2019-2077-01 Low NTP Bug Fix

red hat
Calendar Grey August 6, 2019
Dist Redhat Esm H88
Minor NTP revision for Red Hat addresses stack-based buffer overflow vulnerabilities and fortifies service 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: Stack-based buffer overflow in ntpq and ntpdc allows denial of service or code execution (CVE-2018-12327)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow bug fix Red Hat Enterprise Linux low impact NTP update

References

https://access.redhat.com/security/cve/CVE-2018-12327 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: ntp-4.2.6p5-29.el7.src.rpm
x86_64: ntp-4.2.6p5-29.el7.x86_64.rpm ntp-debuginfo-4.2.6p5-29.el7.x86_64.rpm ntpdate-4.2.6p5-29.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: ntp-doc-4.2.6p5-29.el7.noarch.rpm ntp-perl-4.2.6p5-29.el7.noarch.rpm
x86_64: ntp-debuginfo-4.2.6p5-29.el7.x86_64.rpm sntp-4.2.6p5-29.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: ntp-4.2.6p5-29.el7.src.rpm
x86_64: ntp-4.2.6p5-29.el7.x86_64.rpm ntp-debuginfo-4.2.6p5-29.el7.x86_64.rpm ntpdate-4.2.6p5-29.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch: ntp-doc-4.2.6p5-29.el7.noarch.rpm ntp-perl-4.2.6p5-29.el7.noarch.rpm
x86_64: ntp-debuginfo-4.2.6p5-29.el7.x86_64.rpm sntp-4.2.6p5-29.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: ntp-4.2.6p5-29.el7.src.rpm
ppc64: ntp-4.2.6p5-29.el7.ppc64.rpm ntp-debuginfo-4.2.6p5-29.el7.ppc64.rpm ntpdate-4.2.6p5-29.el7.ppc64.rpm
ppc64le: ntp-4.2.6p5-29.el7.ppc64le.rpm ntp-debuginfo-4.2.6p5-29.el7.ppc64le.rpm ntpdate-4.2.6p5-29.el7.ppc64le.rpm
s390x: ntp-4.2.6p5-29.el7.s390x.rpm ntp-debuginfo-4.2.6p5-29.el7.s390x.rpm ntpdate-4.2.6p5-29.el7.s390x.rpm
x86_64: ntp-4.2.6p5-29.el7.x86_64.rpm ntp-debuginfo-4.2.6p5-29.el7.x86_64.rpm

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2077-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2077
Issue date: 2019-08-06

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 Low. 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 denial of service buffer overflow bug fix Red Hat Enterprise Linux low impact NTP update

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

1550637 - Server time not being synchronised with NTP after upgrading ntp packages

1593580 - CVE-2018-12327 ntp: Stack-based buffer overflow in ntpq and ntpdc allows denial of service or code execution

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